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Be careful what you write... (Lania and Eternally Chaotic)

Lania

Lania

Moon
Joined
Jul 5, 2017
“Can I help you there, my girls?”

Tilly flinched, she hadn’t heard the elderly shopkeeper coming up behind them. The woman had seemed busy with something then the she and her sister had entered the shop, and the teen had been hoping that they would escape notice.

“Huh? No, no thank you. We were just browsing” the girl responded. Honestly, she was finding it hard not to roll her eyes. She knew that trying to sell your merchandise was just part of the job, but what lies did this woman plan on telling?

The store Tilly and her sister had walked into had only just opened up, and the sign above the door claimed it was a boutique of genuinely magical artifacts.

“Browsing my dears? And yet you seem to have walked straight to the most powerful artefact in my store. There must be a touch of witch blood in you, to draw you to such a worthy treasure”.

Tilly opened the book she was holding and motioned to the blank pages with her other hand. “Oh really? What mysterious powers does this completely empty book hold?” She questioned, unable to stop the sarcasm dripping into her voice. “The power to give careless people papercuts?”

The old woman actually smirked at the comment “Girl, the book you hold is called the tome of self truths. If you write on its pages, its magic will cause your desires to come true. However, the spell will only work if you write about yourself, you cannot dictate the lives of others wise this book”.

Scoffing, Tilly questioned “So, I could just take a pen and write that I found a bag with a million dollars in it?” Glancing at the price on the shelf she added “You’d be asking a lot more for it, if it actually was magic”.

With a patient smile the old woman shook her head. “No girl, the book has its limitations. It cannot grant material possessions, nor can it grant you any magical powers of your own. It cannot tamper with matters of life and death, nor be used to alter the past or predict the future”.

This time, Tilly actually did roll her eyes. “I, frankly, don’t believe a single word of that. However, luckily for you I do need a new diary. I quite like the pattern on the front, and it’s got a hole on the cover for a lock… so I’ll take it”.

The shopkeeper now looked amused as she warned “A diary, so you’ll be writing about yourself in this book my girl? Bear in mind what I have told you. Anything that you write which is not already true, will become so. Should you fall victim to your own words, just remember. To reverse the effects, tear out the page. In time the pages will grow back, you needn’t worry about exhausting the tome’s magic”.


It was a big house, and if you were unlucky it could sometimes feel like you could go hours without seeing anyone. That was why Tilly had made an effort to make sure that she spent some time with her sister this weekend. Now that they were older it was a common occurrence that their parents would love them alone for a few days at a time, and this was one of those times. Right now the two sisters were in the living room of their family home.

Tilly was sprawled out on the sofa, the sweet spot where the air conditioning was strong enough to feel, yet not too breezy. She was wearing a green tank top and a pair of cotton shorts, having taken her bra off after their shopping trip that morning, as the hot weather had started making it uncomfortably warm.

The movie that they were watching had been listed as a comedy, but the only funny thing about it was how liberal the director had been with nudity and sex. Tilly wouldn’t have been surprised to find a porno with a similar plot. It hadn’t been too bad to start with, she’d enjoyed watching some of the steamy scenes, and had even enjoyed the slight thrill of being a little bit turned on with her sister in the room. It was getting to the point of absurdity though.

Feeling her cheeks heating up yet again, she grabbed the remote and hit the pause button. “Are you actually watching this Ashley? I’m not really paying much attention” the teenager lied. It was another of the lesbian scenes that had just come up, with two girls passionately kissing, their lips frozen together with how the movie was paused. Gay women making out wasn’t really something the brunette wanted to watch, and she was fishing for an excuse to turn the movie off. But then again, her openly gay sister might actually be enjoying the movie more.
 
Ash had followed her sibling into the shop. The two didn't go out shopping like this a whole lot. While not exactly for lack of desire to but ash was popular, and the two didn't precisely share a lot of the same interests. Ash was a active girl, she loved playing sports, going for a run, a walk, she was fit. Where her sister was far more content to sit in a dark room for days at a time in front of a screen. While she found the fun in games, computers and stuff she still wanted to get out in the sun. Even so she was still fairly pale, despite her being active in the sun. A lot of her current sports due to the summer heat was like water sports. She loved diving into the pool and soaking in the cool water. The attention she got in her swimsuit was always just a added bonus.

So this shopping trip was a good outing for them. Shrugged when Tilly began to talk with the shopkeep. Rather then interfering she wandered the store, looking over the odds and ends. Finding a lot of interesting things, though nothing she would buy immediately, on this little outing. After all she could come back anytime and buy stuff. She was saving up for some stuff, namely a bitchen bike, she wanted a motorcycle and god dammit she would get one sooner or later. By the time her sister was ready to leave she was strolling out looking sufficiently amused with the selection, it was a fun place to just browse.


Ashley or Ash as she generally just went by, save time and she didn't care what people called her, was sitting a bit away from her sibling. She didn't need the AC right on her, she was comfortable without it. She also was wearing a lot less. Sitting there wearing a side tie bikini bottom. She had gotten out of the pool in the back about a half a hour to a hour ago and didn't bother to change. She had kept on what she got out of the pool, with a thin jacket that was hardly even one as her top. The indents in the cloth suggested there wasn't anything separating her breasts from them and there wasn't anything when she entered the pool. Ash didn't know the concept of 'shame' and often swam in the pool in there backyard topless. She made sure there parents weren't home when she did it. Her dad got awkward when she did it if he was around.

Suddenly right when the lesbian scene started the movie paused. It was a crummy movie and was more like watching a seventy's porno then a modern movie. Which she found funny but they had a attractive cast so she could get into it. As her sibling sought for the excuse to escape the movie that was turning her on even if only slightly, Ash made a slow dramatic turn to her. "Am I paying attention to it? Well you better hit play and find out or this is about to become a live action movie and were going to assume the roles of those two on the screen." Ash said clearly joking given her tone. Unaware how her sibling might actually take the thought of it. She would often flirt with her, and get a bit 'physical' with her but no real groping or openly sexual things. Mostly like blowing into her ear, running her finger up her spine and such. Though what she said was clearly sexual.
 
“Quit being so gross. You know that I’m not into girls at all” Tilly protested, taking one of the socks that she’d taken off earlier and casually throwing it at her sister. It missed, just landing on the seat next to her.

All the same, the fake ‘threat’ that her sister made was enough to make Tilly shudder a little at the idea, and she pressed play again to avoid any further arguments. Her attention didn’t go back to what was happening on the screen though, as she become lost in her own thoughts, playing what Ashley had said back through her mind.


Over the last few months, tilly had developed something of an obsession. A friend of hers, Courtney, had been snooping around in her brother’s room and found a small collection of Japanese cartoon porn magazines that had been hidden. As a joke she’d shown them to Tilly, not expecting that the brunette would actually like them.

Since then, Tilly had been steadily building a secret collection of her own. At first she had tried a little bit of everything, different genres, long term stories, quick smut-fests and everything in between. Annoyingly, due to Japanese laws they had all been censored, with parts of the images covered up. The only ones she had found so far that were untouched were of a very specific genre – incest.

At first she tried to ignore the stories, just looking at the pictures and making her own fantasies up in her head to go with them. It had been fun for a time, but she’d finally given in, and read the stories as intended. Over time though her tastes had changed and expanded. She no longer just read the comic books for the pictures, she found herself really getting into the incest themes as well. Tilly didn’t have a brother, and so fantasizing about a made up situation with a made up person had seemed harmless to her.

At least, it had been until in one of the stories, the protagonist’s older sister had joined in as well. Despite not liking women, the pictures of lesbian sex had still been alluring. Surprising herself, Tilly had masturbated while looking at them several times. That was when the unfortunate side effect had started.

It was Ashley. Part though through touching herself one time, Tilly found that completely unbidden, the image of her sister flashed into her head. Sever since then, whenever Ash teased her by slowing into her ear, or making jokey lesbian comments like the one she just had done, Tilly found herself blushing profusely and feeling more than a little warm.

Snapping back to reality, she glanced at the screen. One of the women was now topless, and was rubbing her breasts into the other’s face. “Oh come on, you can’t really be enjoying this, it’s practically soft core porn!” the brunette complained, picking up the remote again and turning the volume right down to get rid of the moaning sounds.

She picked up the bag next to her, and from it she took at the book she’d bought earlier, as well as a pencil. Putting it right in front of her face to block the view of the screen, she opened it and started to write – reading her words out loud as she did.

“My sister is a loser”.

Then with a mock gasp, she lowered the book and looked at Ashley. “Oh my god, the woman in the shop was right, this book really works. You are a loser!”
 
Ash batted the thrown sock away before it hit her. "Your missing out, girls offer much more then dudes do. Trust me, yeah they have a dick sure but what else? More then half of them don't even know how to get a girl off. I rather sleep with someone that lasts longer then a minute." Ash retorted with a grin admitting she was active, which considering her popularity wasn't surprising. As the movie began again Ash relaxed into the couch and began watching again. She had no idea of her siblings current obsession. She knew she had used porn to get herself off. She had heard her a number of times, the walls between there room weren't that thick, but whenever out of a sort of respect she would turn on her tv, put some music on or what not to give her privacy. Hey, she wasn't the kinda girl to sully a mood or fantasy, she wouldn't finger block her sister. When her sister finally snapped back from her little fantasy world, Ash looked at her putting a hand in front of her own face and waving it up and down. "Look at this face Tilly, does it look like it's complaining? I mean really shes got about the same size as you. I wouldn't be complaining if either were on my face right now. Now stop screwing with the remote before I fuck it out of yo hands." Ash commented once again in a purely jokey tone but also flat out said she wouldn't mind feeling Tilly's bust on her face and that she would 'fuck' the remote out her hands. However it seemed Tilly was using the book she bought to ignore her.

You could see the look of 'You have to be shitting me...' on Ash's face when her sister began to mock her. Leaning over bracing herself on the couch with one arm she reached up to her sisters forehead flicking it. "That's not how the book works and you know it. I was listening to the lady while I walked around your supposed to write something about yourself not others. Go on if your so bold, write something about yourself and lets see if it works, come on! I dare you!" Ash said, finally shifting her attention off the soft core porn on the screen. She couldn't explain it but she had felt something from the items in that shop. Like there was more to them, she couldn't explain it. She was always the more sensitive of the two. Complaining about seeing ghostly people when she was a kid. Even now she was a paranormal freak. Cute, sporty, active but a big lover of all things spiritual and ghost like.
 
The brunette didn’t agree with that her sister was saying, but then again, she wasn’t particularly well placed to be offering judgement. She wasn’t really interested in sleeping with girls at all, and had very limited experience when it game to guys. The most she had done with a guy was to let him stick his hands up her shirt and give her boobs a squeeze. He hadn’t even realised that she was trying to lead him on, with the fact that her bra unfastened at the front. Still, she didn’t really want to admit that to her sister though.

Instead she quoted something from one of her comics. ““Yeah, not all guys are great in bed to start with, but my friends told me that it’s kinda like having a pet dog. You don’t expect them to know all the commands like sit and beg when you first get them as a puppy. You’ve got to teach them what to do”.

It wasn’t until the words were completely out of her mouth that Tilly realised how degrading that sounded. “I… I guess they didn’t quite word it like that, but you know what I mean. If you want someone to be good in bed, you’ve gotta be patient, and show them what you like”.

With a sigh Tilly picked up the remote and threw it to her sister. If Ash wanted to watch porn so much, then she could play it for herself. Also, it would hopefully distract her from what Tilly had just said. It didn’t seem to work though, as Instead Ash started to talk about having boobs in her face. The younger girl blushed yet again as her sister said that she’d not be complaining if…

“What? You’d honestly want your own sister’s tits in your face?” Tilly asked. She knew that she probably should have sounded grossed out, but from her own reading of so many incest comics, she was a little desensitised. Instead, it came out sounding more like curiosity. Trying to hide it, she added “I guess losers can’t be choosers”.

When the subject went back to the book, Tilly thought back and realised that her sister was right. “I wasn’t really paying much attention to her, y’know? I mean, it’s obviously bullshit”. She rolled her eyes as her sister practically dared her to try it out. Tilly wasn’t an idiot, she didn’t believe in dumb things like that, and wasn’t at all superstitious.

“Alright fine” she agreed, taking the pencil again and then pausing for a moment as she considered what to write. It had to be something that would be very obvious and visible, otherwise it wouldn’t prove that the book didn’t work.

After a moment of thinking, she announced “Right then. Since you’re so obsessed with boobs”. Then as she wrote again, she spoke the words aloud for Ash’s benefit. “My tits are twice as they are now”.

As her pencil stopped moving, nothing happened. “There, see? It’s utter bullshit. Nothing happened. I may as well add This. I’ve got a huge bubble butt too”.

With a smirk she tossed the book to her sister. “Read it for yourself, I’m not lying, that’s exactly what I wrote”.

A loud gasp came as Tilly was distracted by a very strong, strange sensation in her chest. The only way she could describe it was like a balloon filling up, but with something soft and squishy instead of air. It lasted only a second or so, and when she looked down, she let out a little shriek of surprise.

The material of her tank top was stretched tight, the very obvious shape of a huge pair of tits tenting the fabric. There was more than a little ‘side boob’ spilling from the side of the garment, and as tight as it was, her nipples were very clearly visible.

A moment later, the same sensation repeated itself around her backside, and glancing over her shoulder in horror, Tilly saw that her shorts were stretched tight, dipping between her newly rounded ass. She looked she’d got ass implants like Nicki Minaj! She certainly had all the buns any anaconda could want.

Suddenly, she remembered what the woman in the shop had said.“Should you fall victim to your own words, just remember. To reverse the effects, tear out the page

“No, no no…” she whimpered, trying to cover herself up with her hands, sheer panic on her face. That was when she remembered that she’d thrown the book to her sister. Of course, by now, Ashley had the book in her hands.

“Ashley… T-tear it out!” the brunette ordered, doing her best to cover herself up with her hands. Given her new proportions, it was something of a lost cause.
 
"Oh yeah there a puppy huh? Well who says I want to train a dog to do a trick that a Pussy cat can do already?" Ash retorted in a joking manner she still took none of it seriously. Her serious was a genuinely weird thing to deal with because she was always so carefree about everything. She got the meaning but still you can train them to what you like but stamina and there ability to keep themselves for cumming quickly was not such a easy thing to do. "Hey, I don't judge by blood connections. Besides we both know photo's of me have more boys nutting then there needs to be. So who's the looser when more boys and girl's are getting boners because of me?" Ash said cocky knowing she was popular and a number of people wanted to sleep with her. Confidence was a stunning quality she had. You could say it bordered on a ego. Though the fact was she was fairly right, when she was asked out by boys and girls constantly. Funny enough she rejected almost all of them. It seemed Ash had a standard for dating that nobody really fit the bill for. "Of course you weren't but it's interesting none the less. It's a book with a little story, I mean come on. It's a little cool for a book to have a backstory." Ash retorted to her sister. Of course she hadn't took the lady seriously, Ash didn't really take her seriously either. After all why should she?

Seemed like her sister took the bait, she didn't expect anything to happen but it was a fun thought if it would what would she write? Ash couldn't help but snicker at Tilly's choice, it was obvious changes. Taking the book she did read it and she was honest with what she wrote it was amusing to see her actually write such a thing. However her loud gasp startled Ash almost making her drop the book. "Tilly you alright?" Ash said looking over to her sibling. Ash's jaw nearly dropped as she watched her sisters breast gradually expand to twice there size. Then came the expansion to her ass, "Woah, woah, woah! You look like your about to go on stage next to some big black rapper as his ho!" Ash said not even thinking before she spoke. The look of shock on her face made it easy to tell shock overrode her concept of what she shouldn't say. Looking over her sisters body then down at the book, "Now, now hold on here, this book is legit! If this thing is real then... What other stuff could we do with it, we should 'expariment' and enjoy it for the moment." Ash had the pencil and the book in hand moving her body to push her sister away with her legs if she tried to dive for the book.

"Lets see here since your Soooo into boys lets see what a girl would look like with the only real good part of a man hmmm?" Ash said in a devious tone what could she be planning? She began to write and penciled something into the book before quickly lifting her butt and putting the book under her so she sat on it. She then looked at her crotch eagerly, this was something. The skin under her bikini bottom began to bubble. She quickly undid one of the side ties to loosen it up. Suddenly her skin began to expand out ward and moved higher and higher. Veins taking shape as a swollen pink head took the lead. Ash gasped and moaned her toes curling and she made such a erotic face almost like she was cumming. It only lasted a few seconds but as it ended as she regained composure, sticking out from her bikini bottom was a myth to many people. Twelve inches in length, five or six inches thick, it was a monster of a cock, it was absolutely huge!

It would destroy anyone who took it on, fuck if you go black you never go back. If you went Futa there was no way you could go back! "Wow! I only wrote I had a huge Futa cock but this is amazing! Look at this Tilly it's bigger then a freaking pornstars!" Ash laughed this was amazing she was so enthralled with the fact it happened. She didn't even consider, she was letting her sister stare right at her cock without a care.
 
Blood ties didn't matter to Ashley? Of course, with her own obsessions with people ignoring blood relations, Tilly's mind start racing at a hundred miles a minute. Was her sister into incest as well? Was it something that they could talk about together? Of course, other pressing matters, like the fact that her tits and ass had just ballooned in size, quickly took her mind in another direction.

"What do you mean?" The brunette complained. "Does it look like I'm alright? I look like something out of a damn cartoon. I can't go anywhere like this, if mom and dad see me this way they'll completely freak out. They'll think that I waited until they were away and got myself a boob job with their money or something for crying out loud!" It was true of course. anyone who had ever seen the teenager before would have to be completely blind not to notice the very obvious changes to herbody shape. Not even loose clothing would help. Hell, for that matter Tilly doubted that most of her current clothing would actually fit her in this state.

Her breasts didn't actually look fake though. Despite the book giving her unrealistic body proportions, her breasts still held their normal, natural, teardrop shape. Not like the oddly-round and immobile breast implants she had seen on pornstars. The same wasn't quite as true for her ass. Tilly hadn't been athletically built liker her sister, but her rear end had been nicely toned. Now, every time she moved she could feel it jiggle a little, as if it had gotten more squishy, softer. Unable to help herself, she reached back and gave it a squeeze. Sure enough, her fingers sank into the yielding flesh deeper than she would have expected.

It was clear that Ashley didn't plan on giving the book back though, or tearing out the page herself. Tilly knew that pose her sister had taken well, from the many times that they had argued over whose turn it was to have the TV remote. Instead, she found herself watching in morbid curiosity as her sister wrote. Was Ash crazy? Surely she had to see what a bad idea this had all been!

Curiosity turned to shock as she listened to Ashley, surely she didn't mean... But yes, she did. Tilly watched as her sister sat there, proudly displaying her new cock. "Really? What's wrong with you!" the brunette cried in exasperation. "You find out that a book is magical, and your first thought is to give yourself a huge dick?" Tilly was quickly quieted, by the realisation that her own first thought had been to give herself huge tits. Was she really any better?

Tilly realised though that her sister was distracted, staring at her new appendage. It was massive, captivation, and Ash's boast that it was bigger than a porn-stars was an understatement. It was the perfect distraction, it would give her the chance to grab the book from under her sister. Before it was too late, she reached out her hand... keeping her eye on her sister's futa-cock as if it were a guard dog.

At the very last moment, an insane impulse took over Tilly. Her hand changed path, and instead of grabbing the book, she found herself wrapping her fingers around the thick meaty pole protruding from her sister's lap. It wasn't as if this was wrong, was it? It wasn't even real, it was just part of the magic from the book. All the same, it felt very real, and of course It was the first time Tilly had ever touched a real penis. She was transfixed. The skin was so smooth, warm, and she could feel the rise and fall of the veins.

With a gasp, the brunette suddenly let go as if she had been bitten. With a glare she told her sister accusingly "It throbbed! I didn't know they did that!"
 
Ash was far too distracted by her new meaty member to of responded to most of what Tilly had said. Was she alright, she looking pretty fine and dandy to her. Yeah people would notice the change but hey if there was any sign the two of them would of surly been running for there rooms to avoid being seen and ripped it out there. So why nit enjoy the changes while they were there? Though Tilly's comment about her choice in what she wrote after she found out the book was magic. "Oh im sorry we were just watching what could be considered a soft core porn, talking about banging guys and here I am thinking 'hey Ash what would it be like if you had a cock for yourself. I mean after all Tilly decided to go with increasing her feminine assets why not give yourself some male ones to counter it?' You know?" Ash said strangely the line of thought made some sense considering what they had watched before this both of there brains were on naughty thoughts. Though likely Tilly's more then Ash's. However her retort didn't last long as she felt her sisters slender hand wrap around her new friend. Gasping loudly as she felt her fingers move along the sensitive mass. It was a brand new sensation for the girl it was intense and nearly left her breathless.

Was this what boys felt? Good lord! How did they only normally last only one go!? This felt so good that she wanted to go as many times as her body would let her. A little pre-cum had drizzled down onto Tilly's hand before her cock throbbed to the sensations. Breathing slowly to try and keep control of herself Ash wasn't keeping it together very well. "Of course it throbs Tilly! It's a cock there like meaty sensation sticks, I donno how else to say it." Ash said with a pant looking down in amazement. Examining the twitching mass before slowly wrapping one hand around her cock it felt different less satisfying when it was her own hand. Slowly moving her hand up and down jerking herself off. "One touch felt great, I can see why guys constantly want to get laid. I gotta expariment with this thing more! What is it like to cum with it? What does my cum taste like? What would it feel like to fuck a girl with this? To bury it deep inside her, to hear her scream in pleasure..." Ash was mesmerized by the idea. Her lesbian nature was clashing with the introduction to male hormones, creating conflicting ideas and thoughts in her head.
 
Tilly’s cheeks had turned bright crimson as she now realised what she had done. Without asking, she had just reached out and groped her sister’s new cock. She was lucky that Ashley hadn’t slapped her hand away and told her to stop being so weird. That wouldn’t really have been like Ash though, she had always been pretty laid back and not the type to lash out like that – especially when the situation was such an odd and unparalleled one. “Um, sorry, I probably shouldn’t have done that” she admitted sheepishly, her hands now clasped behind her back. Tilly had felt the warm wetness of the pre-cum on her hand, and using one of the fingers of her other hand she was now spreading the slick liquid, swirling it around.

As her sister spoke again, Tilly was only half listening, part of her attention on her own fingers, most of the rest taken by the view in front of her. Only the words ‘Meaty sensation stick’ stuck in her mind. The girls however, were probably thinking about it differently. Ashley was likely thinking about the sensations she could experience with her new fuck-stick, whereas Tilly was thinking more about the sensations that such a massive cock could provide. Being a bit of a pervert, the brunette did own a few rather large dildos, but the biggest was perhaps eight inches long, and nowhere near as thick as the tent pole sticking up from her sister’s lap.

“Yeah…” the younger sister half murmured as she listened. “I wonder what it would feel like too…” though again, she suspected that their viewpoints were reversed. She could imagine what it would feel like to have such a large stiff member plunging into her, and allowed herself to daydream for a few seconds as she stood there. With a jolt, she remembered exactly who that cock was attached to.

She’d practically forgotten about the changes to her own body as she settled into the chair next to her sister, though it was impossible to completely ignore the new weight on her chest. Thankfully, her inflated backside didn’t seem to affect sitting down. “Do you have balls now, or is it just a cock? Can you even cum? Maybe you should try it” Tilly blurted out, the words coming in a rush.

Her curiosity had clearly gotten the better of her, and with a hitch in her throat she suggested “Are you going to play with it? Can… can I watch?”
 
Ash didn't really register her apology, it was that touch that had started all this. So it wasn't something really to apologize for was it? She was savoring the slow jerk, each new feeling was exciting as her pre-cum was slowly lathering her cock up. Though Tilly's own words did stick 'I wonder what it would feel like too…' She hard that tone plenty of times when girls on the fence were about to try there first lesbian experience. Slowly the wheels were turning in her head when she was distracted again. What did she have balls? Good question actually reaching further down she felt them, holy crap they were huge. It was like holding a full large apple in her hand. The skin was held tight and they felt full.

"I guess I have balls, and they feel really full. I wonder just how much is in these things." She said as her head suddenly snapped to her sister. Her of all people was asking to watch her beat off. However be it due to the new hormones, the changes to her body or what. She saw her sister more as a woman then a sibling. Such a strange sensation, but one that was quite real. "Well I can find out what it feels like to cum on my own and I can taste my own cum after I do. However the third thing I can't do on my own." Ash said getting off the couch, standing before walking right in front of Tilly. Her cock at eye level with her sister. "How about instead of watch you 'participate.' I could always use a 'second opinion,' on how my cum tastes after all." Ash said jokingly yeah she saw her more as a woman now but she was still her sister. She was expecting a gross or something from her sister. Having her go beat her meat off where she could watch.

Unaware what this would trigger in Tilly's head. Tilly's sister, now a futanari, just suggested they fuck to test it out, the incest alarm would be blaring in her head by this point.
 
As Ashley stood up and pointed her cock directly towards where her sister was sitting, Tilly felt her heart skip a beat. Having that huge thing pointing right at her felt like looking down the barrel of a loaded gun. Or perhaps, a cum cannon was more appropriate in this situation. The way that Ash teased about not being able to try the third thing on her own confused Tilly for moment, before her pace paled as she remembered what her sister had said a moment ago. With her heart in her throat, the younger sister was about to start a nod when she realised that, of course, Ashley was only joking. But damn, if it wasn’t a tempting thought.

Then as her sister spoke again, the words really hit home with the brunette. ‘I could always use a second opinion on how my cum tastes’ … with the way her cock was at face level, how hard it was, the pre-cum now coating her tip… was Ashley asking for a blowjob? The thought of having it pushed into her mouth made Tilly queasy. Not because of the idea of sucking cock. Not even because it was her sister’s member she’d be sucking. But the size of it.

“I… I’ve never done that before. It’s so big… I don’t think I’d be able to”.

Somewhere inside Tilly her mind was screaming at her to stop being such an idiot, to stop wasting this chance to sample such a magnificent sample of cock. That was her lust speaking. Common sense told her that if she tried, she’d probably be sick. That she would need to practice on something smaller first, like one of her dildos. Just as she was about to push Ash away and tell her to stop being silly, a thought occurred to the brunette. But how to word it so that Ashley wouldn’t refuse?

“Um, I could let you…” she pointed to her chest. The gesture wasn’t very clear at all, and she was forced to elaborate. “These tits, it’s not like they’re really mine, or that cock isn’t really yours. It’s just what the book did to us. If you wanted to, and it’s not too weird for you, you could…” Tilly gulped before she shrugged and almost asked it as a question “Tit fuck me?”
 
You could see Ash's eyes go wide when Tilly said 'I… I’ve never done that before. It’s so big… I don’t think I’d be able to.' Holy shit was she actually considering this? Like... Ash had not expected her to actually consider it but this was a new one. She knew she could be into some weird stuff she kept herself in her room and had hentai she knew that, but to actually consider banging her sister was not something she pegged her for. Ash was joking thinking Tilly would flat out refuse but she was considering it? She really began to take it seriously, was she really about to fuck her sister. She didn't seem keen on the blowjob so she thought she would escape the choice of does she or doesn't she. However Tilly's words made her jaw drop, she was really asking this! She was into this whole situation!

Holy shit, holy shit! "A-Are you serious Tilly? I mean were still sisters you know? I donno what this thing will do to me when I cum. If we do this I might not be able to stop you know?" Ash said actually considering what could happen. Little did she realize it would likely turn Tilly on even more and actually make this all the more something she would anticipate and be eager to do. "I mean, what if I am unsatisfied just using those bouncing beauties of yours? What if I can't control myself and force myself on you and begin to rape you? Forcing my cock deep inside you and hammering your pussy till it breaks, raping you until your mind is mush. Till you can't imagine a day without my cock and your nothing but a cum drunk love slave." Ash said and there it was, Ash had a habit of reading smut filled erotic stories that tended to lean a little dark. So it was cropping up of her imagination of like the best/worst case scenario that could happen between them.
 
Fuck.

As soon as Milly saw her sister’s eyes go wide she knew that she had completely misread the situation. Had the part about her sister seemingly wanting a blowjob been a joke as well? It must have been, that was the only way to explain her reaction right now. How the hell was the teenager going to talk her way out of this one?

“I… uh… does it really count as incest? I mean, it’s not a real cock. It’s made of… magic stuff. Besides, it’s not you I’m interested in, it’s the cock”. The brunette winced. That had come out sounding mean, not at all what she’d intended. “I just mean, that I’m not into girls. You know that, it’s more about what I’m doing, rather than who I’m doing it with”. That didn’t sound much better…

What Ashley said next should have put an end to it all. The thought of her older sister forcing herself onto Tilly… except there was a problem with that. You can’t rape the willing. Tilly had only one concern about sex with her sister… well, two. The first was that the cock might simply be too big for her. The second, less likely, was that she might just not enjoy it. But Ash was right, not that she’d turn into a mindless sex junkie, but what if she enjoyed it a lot and wanted more? Would that actually be so bad? There was only one way to find out, but either way, Tilly doubted that her sister would go as far as she said and actually 'rape' her.

The book had almost been forgotten after Ashley had stood up, now sitting discarded on the seat where it had been. Milly reached over and grabbed it, as well as the pencil. Opening it to a fresh page she wrote clearly, but held it so that Ash couldn’t see what she was writing. Once she was finished, she read it over to herself again, then nodded in satisfaction. That should work. After a moment’s thought though, she added a second line of text, before snapping the book shut. Leading by her sister’s example, she then sat on it.

With a deep breath, she took hold of the bottom of her tank top and pulled it off. The breath came out in a sigh of relief as Milly looked down. No stretch marks. Her breasts looked perky and full despite their size, being too new to have suffered from gravity. Her nipples were like two small pink diamonds, standing out hard and proud from her creamy coloured skin.

“I’m not going to force you into anything” she reassured “But if you want to fuck my tits, I’m happy to let you”.
 
"Oh how flattering." Ash said clearly irritated with Tilly. All she said was a constant insult to her. Basically what she had just said she was good for nothing but her new cock. Thick, meaty and massive as it was the fact she was just told she was nothing but a cock on a human stick to her. For some reason that genuinely made her mad. Some how the fact that Tilly had taken the book and chose to ignore the situation of she had just insulted her quite a bit made her even more mad. Writing who knows what in the book, only to set it down with confidence. Then that tone, so calm, so empty of emotion as she reassured her. Like she was in control, somehow it felt almost like Ash was paying a hooker for a titjob! This was her god damn sister practically looking down on her!

Why was this all making her so god damn mad!? Little did she realize that her body was reacting to testosterone from her new male member and it was getting to her head. Her body wasn't built for these hormones and as such she was reacting to them more then would be normal. Looking at Tilly sitting there, the body of a first class whore. Smoothing her shirt out to show off her new assets. A slut prime for the tacking something in Ashley's head snapped. "So my cock is nothing but magic stuff so it doesn't could as incest no matter what we do huh?" Ash she her voice clearly sounding angry. She looked up the look of pure anger on her face as she grabbed a clump of Tilly's brown hair. Roughly pulling her hair guiding her back to the couch practically slamming her face into the cushions. "Well then maybe I should just fuck your new fat ass and see just how not real and made of magic stuff it is when I am painting your womb white with my 'magical' cum huh!" Ash yelled at her pushing her head harder against the couch. She had a look as if she had really lost it on her face.
 
As soon as her sister spoke, Tilly could tell that she’d really put her foot in it. The worst part of it was that she didn’t really mean what she had said. The brunette had just been saying what she thought would encourage Ashley to act on her jokes. Well obviously, it hadn’t worked. Tilly always had been a terrible liar after all. This time her lie had had the opposite of the intended effect, just making her sister angry instead of allowing the older girl to justify the situation.

Before she could try to explain herself, Tilly found herself grabbed by the hair and pushed face down into the couch cushions with her ass up in the air. The tug on her hair hurt, but not as much as it should have done. One of the two things that she had just written in the book must have worked then. That didn’t make the situation any less terrifying though. Ash was normally an easy going person, so to see her act like this must have meant that something was seriously wrong. The things that Tilly had said weren’t exactly kind, but had it really been that bad? No, there must have been something else going on.

It was impossible to try and work out what was wrong though. The fact that her sister still had a grip on her hair was a huge distraction, but that wasn’t the worst part. As Ash continued to speak, the mental image of that new huge cock between her legs stuffing inside Tilly’s holes and ‘painting her insides white’ made the girl let out a little whimper, thankfully muffled by the couch cushions shoved into her face.

Turning her head as best she could in order to free her mouth, which wasn’t very much, Tilly decided that the only recourse now was to tell the truth. “Alright, fine!” She growled at her sister. “If you really want to know, then yes, I know full well that it definitely would be incest if you decided to fuck me with that damn thing. And you know what? The idea of being fucked by my own sister turns me on more than you could believe. And it’s all because of those damn comics I’ve been reading”.

Tilly had no idea if her sister knew about the comics, but someone had been snooping around her room. None of the bedrooms in the house had locks on them, and more than a few times Tilly had seen her possessions not quite where she’d left them. She suspected that it was her mother rather than Ashley, but she could have been wrong.

With her secret out in the open now, the teen was undeniably feeling vulnerable. Of course, it could also have had something to do with the fact that her newly expanded ass was raised in the air, pointing right at the person who was holding her down by her hair, having just threatened to fuck her.

The suspense was making it ten times worse, and surprising herself Tilly snapped “Well then? Either pull my shorts off and get on with it, or get the hell off me”.
 
Ash glared with utter anger in her eyes, however as her sibling spoke that look turned to surprise. "Wait WHAT?!" Ash said in shock still holding her down but she lessened the grip on her moving her had down to between her shoulders so she could talk. Though it seemed the anger had lessened there was still irritated as she tried to comprehend what she had said. Was she just fucking with her? No she couldn't she wouldn't of taken such a bold stance of either pulling down her shorts and fucking her or getting off. Putting a renewed force onto her back now to keep her down. "What do you mean Comics!? You mean those Hentai doujins in your room? What the hell does tentacle porn have to do with fucking your sister!? Tentacle porn and inces-" Ash yelled stopping herself thinking about hentai. There was a lot of ganres and types, and incest was one of those themes that hentai had a lot of. All she had ever found when messing around in her siblings room was the tentacle ones and a few generic themes. "Wait do you have a collection of incest as well? I mean I found your tentacle porn but do you really have like incest stuff and shit? ARE YOU TRYING TO PROVOKE ME TO FUCK YOUR FAT ASS!?" Ash voice seemed to jump as she was starting to catch on to Tillys desires. Ash wasn't precisely the 'brightest' crayon in the box but she wasn't stupid either.

She was truthfully quite smart she just missed simple hints often times. If she was really wanting this what did she write in that book? The wonder of the situation had her as she looked at her new large ass. If Tilly really was getting off on the idea of fucking her then she would likely get turned on more if she did something naughty right. Looking at her ass and given the situation she couldn't pass it up. Putting her full force she smacked her sisters impressive backside through her shorts to see what kind of reaction she would give.
 
By now, Tilly practically wanted to slap her sister. The other girls was making so many twists and turns in this conversation that the brunette felt one more might lose her for good. Ash had been the one to suggest sex before the brunette had brought it up, she had then been the one to bend Tilly over with her ass in the air, and then been the one to threaten to fuck her ass. Now she was the one who was shocked? To top it all off, her cock was still hard. What was Tilly supposed to make of that?

At least she got her answer about the hentai comics. So it had been her sister that was snooping around. “Yes, I have incest comics too” the brunette admitted, glad that the hand holding her hair let go. It was then that she realised that if she wanted to, she could probably break free. Without a grip on her hair, there was nothing to prevent her struggling. It dawned on Tilly though that she didn’t have any desired to escape. She was almost enjoying being in this vulnerable position with her new assesses on display. “I have most of those ones hidden in my locked drawer, but it’s too small to fit my whole collection in”.

At the mention of tentacles, Tilly’s mind did start to wander. That genre, aside from incest, was one of her favorites. With the book so close by, she had to wonder if… no. She was getting far too ahead of herself. She already had one ridiculous situation to deal with, and there was no avoiding Ashley’s shouted question.

“Not my ass, you’d break me in half if you tried that!” Tilly protested. “But maybe…” The brunette’s mouth clicked shut as she felt the hard impact on her ass. She only narrowly avoided biting her own tongue, being mid-sentence at the time. The sound that escaped her lips however was partway between a gasp and a moan.

Heat blossomed in the brunette’s cheeks as the sound reverberated through the room. If she hadn’t been so busy using her hands to support herself as she was bent over, she’d likely have clapped one over her mouth to silence the sound. Being spanked wasn’t something the teen had ever expected that she’d enjoy, but there was no denying it. The blow had sent a cascade of bittersweet vibrations running through her lower body. No small number of which seemed to have found their way between her legs, turning them halfway to jelly.

The indignation of it all, not the mention the rapidly spreading sting meant that the Brunette didn’t have to fake her reaction.

“OW! WHAT THE FUCK?!” Tilly gasped as she felt the sharp crack of the hand against her ass. A hot pain flooded into the skin. Clearly the extra padding that her new ass provided had done absolutely nothing to soften the blow. The brunette’s eyes started to water from the sting as she glared back over her shoulder at her sister. “That hurt, you fucking loser”.

This time she did pull herself out of her sister’s grip. But rather than move away completely, she only rolled over so that her ass was no longer sticking up into the air. She did her best to glare at her sister, but the effect was ruined by the wet spot on the crotch of her shorts – Tilly clearly wasn’t wearing panties. Nor for that matter, would she try particularly hard to resist if her older sister wanted to roll her back over again.
 
Ash wouldn't be surprised if she had been hit by her sister. She genuinely knew she was dense to things that were blatantly obvious. She tired to notice them but seemed to be a consistent failure in that respect. Ash was genuinely surprised that Tilly had those kinds of Doujin's in her possession. While they were common hentai types. They were very much subjects that trying to explain them away would be impossible. They were incest and there was no getting around that. If they had been found there would be no way to explain them as anything but incest. However where she admitted that she had kept them was one of the places that Ash had no way to get into. So unless someone was going to blatantly invade her privacy there was no was to find them. That would be there parents domain not Ash's.

She could see Tilly's mind wander when she talked about tentacles. What could be going through her mind right now? Ash wasn't entirely sure she wanted to know... Ash had to admit she was likely right but something in her told her she still wanted to try. When she reacted to the smack to her ass Ash had to raise her eyebrow at it. She could deny it and argue it, but Ash had smacked enough asses to know this reaction by heart. She had enjoyed these thick buns getting smacked. Ash had to guess given there size that they were sensitive to the impact. Giving her fingers had sank into the soft skin. Tilly's protest of anger asking her what the fuck only got a 'You liked it!'

Smug as fuck look out of Ash. Ash got a bit forceful with Tilly grabbing her shoulder and him pushing her back down on her stomach as best as she could before sitting down on her lower back to pin her down. "But you liked it! So if im the looser the what does it make you when you like getting your 'ass beat' by the looser!" Ash said giving her ass another firm smack. Ash with that same grin on her face as she grabbed he shorts and jerked them down trying to get them off her now impressive ass. It wouldn't take long even if she had struggled to keep them on now fully exposed there would be nothing between her ass and Ash's hand. Yet there would be something between her ass. Ash grabbed her cock in the massive glory she had wrote it to be. Pressing it down between the plump cheeks of her ass hotdogging it between them. "Looks like big sister has to dish out some punishment to a naughty little sister who has been keeping secrets!" Ash said that playful tone was clear but oh, did that not bode well for Tilly, she was in 'play mode' which meant she wouldn't hold back. Smacking her ass again she was eager to hear her now.

"First im going to have to spank the bad girl so she knows it isn't good to keep things from big sister. Then I am going to have to fuck her like she was my girl. ♥ Just so the naughty little sister knows ALLLL about what she was missing out on not telling me. ♥" Ash said admitting she was going to fuck her, and if what she said was truthful she would of fucked her a long time ago as well. The moment she had finished her statement another hand made contact with her other cheek. She rubbed the points of impact gently soothing the sting best she could only to deliver another sharp smack to the same area making the sting all the more intense.
 
Ash wasn’t wrong in saying that Tilly liked the spanking, but only a part of it was physical. Sure, the younger sister was quite liking the way that being slapped so close to her sex sent ripples of vibrations running through the sensitive parts of her body. A lot of her enjoyment was in her head though. Just knowing that it was her own sister slapping her ass like this was getting the brunette incredibly turned on.

What Ashley was saying wasn’t exactly helping either. Calling Tilly her ‘naughty little sister’ and saying that she needed to be punished. It was only adding to the younger girl’s indignation. That feeling only seemed to add to the situation though. Knowing that she shouldn’t have been enjoying what was happening to her, and yet clearly having to accept that she was.

When the older girl actually sat on top of the Brunette, it took her completely by surprise, forcing a little of the air out of her lungs. The moaning gasps that escaped her as she was slapped again and again now sounding breathy. Not being able to breathe quite as a freely left Tilly starting to feel just slightly lightheaded, and quickly she found the ‘helpless’ feeling from earlier start to come back. Ash wasn’t exactly heavy, but the way she had positioned herself meant that even if she had wanted to, once again the younger girl would not have been able to free herself. She was going to have to accept whatever her big sister wanted to do…

Tilly wasn’t some submissive, spineless girl though. She wouldn’t simply accept being spanked like this. She was enjoying it right now and so didn’t struggle, even though she could feel the mounting sting on her ass cheeks. It was only a small pain now, dull and distant, only flaring up each time Ash’s hand landed. She knew that her ass was going to be sore later on though, she’d probably have to spend the rest of the day sitting on a cushion. There was no way in hell that she was going to let Ash get away with that.

No, she would make a point of making sure to repay her sister for this rough treatment. Like any sibling rivalry of course, she wasn’t just going to repeat the same thing. No, Tilly would have to do something bigger and better. For now, she hadn’t decided what, being far too distracted by what was going on.

“Make the most of it while it lasts” she told her sister “As soon as I get my chance, I’ll be…”

A gasp cut the younger girl off as she was spanked again, this hit landing very close to the gap between her swollen cheeks. The vibrations coursing through her mound felt stronger than ever as the gasp turned into a loud moan. She was about to complain that Ash was hitting her in sensitive places on purpose, but that much was obvious. Besides, she was completely thrown off by the older girl promising to fuck her. Well, maybe it hadn’t been a promise… but in her desperation, that was how Tilly heard it.

She couldn’t help but bite her lower lip and whimper at the thought of it while her sister rubbed her sore cheeks. She needed that cock inside her, all this teasing was making her crave it. And the thought that if she’d just told her sister about this before now, they might have already done something like this? It was maddening! How could she have possibly known that her sister was just as much a pervert as she was though?

Through Gritted teeth Tilly assured her sister “Don’t worry about that, I plan on making up for lost time”.
 
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