RWBY: Ruby slipped up! (Koibito & Firestarter09)

A drop of sweat ran down Blake's cheek as she humped into Yang from behind, feeling her tight walls clenching and spasming around Blake's kitty cock, her Faunus dick throbbing deep inside as Blake gritted her teeth. Her ears flattened as she tried to hold herself back for the moment, wanting to fuck her friend through her orgasm. She looked down to see Yang's cute toes curling in lewd pleasure as she gripped the sheets in front of her, her ass bouncing wildly from Blake's frantic fucking.

Yang's sweet pussy juices gushed out around Blake's Faunus cock, "Ungh!" Blake growled softly as she dug her fingers into the blonde's plump ass and pulled her harder against her. Yang was different from her sister; Ruby was a lanky, awkward teen, bony and skinny, the perfect little twig to throw around and how inexperienced the quick shooting Huntress who didn't know how to pull the hell out was... It sort of turned her on despite how it annoyed her earlier.

"Shit your sister's not even this tight!" Gasped Blake bluntly, accidentally revealing that she would know such information, but part of her was hoping she missed it. As used up as Yang was nearly daily, her cunt wasn't quite as tight as her little sister's, but Yang was so strong, her body so powerful that her little pussy gripped far tighter in the throws of orgasm.

"Fuck... Fuck!" Blake couldn't hold it after saying that, after thinking of Ruby again. "Ngh!" Blake's dull voice grunted as she pushed deep, leaning over Yang as she used her weight to shove it in, bracing her hands on the blonde's curvy ass as she unloaded. "Fuuuuuuuck!" Hissed Blake as she shoved her dick as far as she could before unloading, cumming inside with a purpose as if she was getting Ruby back earlier.

Blake dumped her load inside, her thick cum shooting deep in Yang's bare cunt like so many others had before, "ngh... You bimbo.." Growled Blake, her cock getting harder talking to her teammate like this, her spunk splashing out into her until she was filled to the brim with Faunus kitty cum.
 
Yang moaned happily, but that was before she heard Blake say something about her baby sister. "Blake?" She asked only to moan as more cum was shot up into her cunt. She heard Blake call her a bimbo and giggled slightly at it, but quickly gained focus. "What was that about my baby sister?" her tone sounded curious and almost angry... Almost, but the fact she still felt a lot of pleasure, stopped her from being really angry.

She felt Blake hand smack her bare bottom, as if to keep her mind off what she said, Yang moaned happily from the slap.
 
The loud smack was indeed an attempt to keep her mind from the slip of the tongue Blake just had as she shot her load up Yang's cunt. "Unnph... Don't worry about it" she growled, pushing into her as she finished, cock still rock hard of course and it distinctly twitched with arousal when Yang called Ruby her baby sister, reminding her of the relationship between the two and that she had in fact fucked both siblings, though she couldn't help but wonder if Yang was in tune enough with her pussy to feel such sudden twitches and so in case she noticed, Blake quickly pulled out and grabbed Yang's ankle, flipping her onto her side.

Throwing one leg up to rest against her agile body, Blake let Yang's other leg extend between hers so she was on her side as the Faunus slid her dick back inside, fucking her suddenly to help her forget that she mentioned Ruby. With her foot near, Blake lewdly trailed her tongue up the bottom of Yang's foot, licking slowly until she slipped the blonde's big toe into her mouth, sucking on it as she fucked her.
 
Yang moaned happily as Blake sucked her big toe. "Hmmmph." she moaned. "Ugh." she tried to gain focus back on to what Blake said, but the pleasure was too much, it kept her from thinking about it, that and the fact her large breasts were in her face. Her toes curled in pleasure, the assualt on her big and pussy combined where enough to cause her eyes to roll back into her head again.

"KITTY CAT GO FASTER!" she moaned loudly.
 
Blake moaned into her toe, knowing how to please Yang anywhere she could touch her. It was no surprise given there probably wasn't an inch of her that hadn't yet been touched by cock, even playing with her smooth feet got a reaction from her favorite bimbo.

The sight of her was intoxicating, watching Yang on her side just casually taking her kitty cock as Blake sucked her toe, her tits smeared and streaked with her cum as the bounced about at the force of the Faunus' hard fucking. Blake's arms draped around the long, toned leg hoisted up against her body, breasts cushioning the school slut's calf.

The cat Faunus couldn't help but think back to Ruby earlier that day. Her cock twitched ragingly hard as she rammed it into the sister of the girl she thought about. Chances were a makeshift cock like that wouldn't suddenly work for real like that, but there was no way to be sure without it actually happening and the risk was still there - Ruby still was a dolt and clumsily spunked in her, now she was gonna take it out on her sister and that thought alone got her going.

"Shit..." she panted, muffled by the toe in her mouth before she pulled back and bit the side of Yang's foot gently, moving back to lick up it, slowly running her tongue from heel to ball, kissing into her arch after as she pounded the blonde.
 
Yang moaned happily again, she was getting close to cumming as she felt she could barely hold it back anymore, her hands gripping tightly on the bed sheets, PAP! PAP! was the sound she heard from Blakes thrusting, the more she heard it the more she forgot about what Blake said about her sister. She really was a bimbo sometimes, though that wasn't her fault for her high libido.

"Blake i-nggh so close." she moaned/panted.
 
Pap pap pap! Yang's favorite sound, and frankly one of Blake's too, echoed lewdly and loudly through the dorm room.

She did it, as she played with her friend's foot, she made her forget about mentioning her sister, blabbing that she had fucked her stupid and that Ruby had accidentally creampied her. That little idiot... There was so much, and it was so warm... Blake's head was swimming as she remembered the feeling of Ruby shaking around on her awkwardly as she blew her load way too quick inside of her. Blake's Faunus dick stiffened up in Yang as she nailed Ruby's sister.

When Yang cried out that she was close, Blake's ears twitched as did her cock in response. "Y-yeah cum Ru-... Y-Yang... Cum" Blake said as flatly as usual in a thick moan against the blonde's foot, pretending like she didn't almost just call Yang by her sister's name.
 
Yang moaned happily almost hearing Blake say Ruby, snapped her from her pleasure, kind of like if someone put a chastity belt on someone, and pleasured them while they were wearing it. PAP! PAP! PAP! the sound went as Blake kept thrusting, she did her best to concentrate on what Blake said, but the pleasure from the foot licking, and the suddened slap on her ass, caused her to moan wildly as she lost her self in a sea of pleasure.

"Blake I- Im ugh Cumming!" she exclaimed.
 
Blake's eyes rolled back into her head as she grit her teeth widely, humping roughly into Yang as she fantasized about her sister. 'Ruby... Ruby... Ruby...' Blake mouthed without a sound through her gritted teeth as she pictured the doofus going cross eyed with orgasm.

"Fuck it..." Blake cursed with short breath, she had to do something that would send her spiraling over the edge, and she had just the idea, "I just fucked your sister today!" Grunted Blake as Yang came hard, screaming out that she was cumming.

She had to blurt it out, she wanted to see Yang's shock, there was too much that was arousing about her knowing and she just had to admit it. As soon as she did, Blake shoved her face against Yang's foot, licking it as she came buckets right into Yang again, picturing doing the same to Ruby to get back at her.
 
Yang heard it and like a freight train suddenly stopping, she wasn't moaning anymore, no the room was silent, very silent, scary silent. "Blake." Yang simply said to her teammate, her aura begun to flare, "what did you just say." as she pulled herself off Blakes cock, she moved her foot away from Blakes mouth, a deathly glare sent down to the faunus. Wiping the dry cum from her breasts she cracked her neck.
 
It didn't matter that Yang stopped, Blake humped until she was finished and honestly, using the blonde while she glared so angrily, aura flaring and glaring at her with those red eyes, it was sort of hot. When Blake finished she pulled back as Yang pulled away, the dark haired girl's black ears flattened out, this time from intimidation.

"Uhm..." Blake fidgeted, "nothing I..." There was no use lying about it now, the Faunus knew what she did, knew she was revealing this to Yang. "Y-yeah... I.. I fucked Ruby and I fucked her hard" she said sternly, dryly.

"But... But she fucked me to, you should know" Blake quickly added, "she has a cock now" explained the Faunus with a nervous smirk.
 
Yang glared at Blake, her red eyes piercing into the faunus very being, "Explain, everything now!" she demanded from her faunus teammate/fuck buddy/person she was shipped with way to much in fanfics. She saw the way the Blake tried to avert her gaze, mostly trying to look at her breasts. "Blake." it sounded like a lot of anger was being held back. It probably was, Yang knew people didn't like her when she was yangry. Out there somewhere someone shouted in rage. A slight snicker came from Yang.
 
Blake tensed up and shut her eyes at being shouted at, her ears perking straight up before flattening again as she looked back to Yang, hardly able to pull her gaze from the blonde's tits.

"Fine" she said flatly, "look, Ruby screwed around with some dust" she said before a sly smirk stretched across her face. "She sprouted a cock and she's worse than I am" she explained, obviously comparing the horniness of the two girls.

Crawling closer to the oh so angry blonde like the mischievous kitty cat she was, Blake smiled as she trailed a finger under Yang's chin. "What, gonna check it out for yourself?" she asked somewhat unprompted, trying to plant the idea in Yang's head. Yang was the known school slut after all, not only was the thought of the least experienced cock in school being overwhelmed by the most experienced Bimbo around, Ruby's mind might actually break.

Beyond that though... Were the two siblings actually about to fuck? Oh lord Blake hoped so.
 
Yang calmed down slightly, thoughts racing about what Blake said, on one this seemed like manipulation, on the other sisterly love and dutys required Yang to make sure Ruby was perfectly fine. If she didn't she would of been a bad bimbo sister. "Blake lets get cleaned up and find my sister!" she exclaimed as she got up from the bed, stretching her smooth cum covered legs, her assets jiggled as she did.
 
Blake's eyes wandered, watching Yang's voluptuous teen body stretch and twist, cum glistening off of her legs as well as her chest. Her breasts and ass jiggled lightly to the movements and Blake licked her lips, cock tensing up at the idea that Yang was actually about to do something like this... To her own sister!

"Yeah, lets" Blake smiled, stretching before she stood.

-----

Later that day Ruby was walking the streets. Class was out so she was in her usual attire; Black and red shin high boots, black pantyhose, a black short skirt dress with a red laced black corset over it, and a red cape with a hood. A loose belt of ammo hung on her waist as well.

It was a pretty dull day and with her team seeming off busy with their own stuff, Ruby was left to go out, maybe shop for some CD's and just to enjoy the nice day.

Would have been good to have some company though.
 
Having taken an hour or two of walking, riding airships, The Y and B of team RWBY had been trying to find the R of the team, eventually stopping at a library, why? Well yang insisted it was her sisterly instincts or well her yangstincts.... She earned groans from Blake. "Alright my baby sister should totally be in this library." Yang said assured to her teammate and marched on into the library.
 
Blake groaned at Yang's puns. It was always her thing to make the most cringingly bad puns she could, often using her own name. The worst was when she would do so during sex, though it was a bit of a guilty pleasure for Blake that it was so bad, in that instance it was good, and it weirdly turned her on. Not that she'd ever admit it.

The duo, lead by the blonde, ended up at the library, and sure enough Ruby had made her stop at the very place.

She stood at a shelf, head buried in a book as she was completely oblivious to the world around her - especially to anyone around who may be looking for her.

Blake tapped Yang's shoulder as she spotted their target across the room. The Faunus blankly pointed Ruby out to her sister, "there" she whispered.
 
Yang smiled as her teammate pointed out Ruby, walking quietly as a mouse and a cat. They approached Ruby slowly wanting to surprise her. Though that could only end so well. Smirking Yang lightly tapped her sisters shoulder and whispered. "Sup sis." in a somewhat creepy voice that would send shivers down anyones spine. Unless of course you were Ruby. Who quickly dropped her book and yelped.
 
A sudden voice whispered to Ruby so creepily deep and husky that Ruby squealed aloud in surprise as she dropped her book, the heavy thing hitting the floor with a loud THUD, earning a shushing from the librarian. Ruby's pale cheeks flushed as she turned around to see her sister, as well as Blake behind her.

"Yo" Blake said dryly with an expressionless wave.

"Yaaaaaaaaang" Ruby whined in a hollow whisper, not only did Yang spook her, causing her to be embarrassed, but that creepy voice of hers... Well, just like everything else recently even Yang being creepy turned her on a bit.

After regaining herself Ruby shook her head, "what are you doing here?" she asked casually, happy to see her friend and sister.
 
Yang giggled like a small child as she put a hand to her mouth to stop herself from giggling. "It was easy sis." Yang explained as she heard Blake groan. "My Yangstincts lead me right to you." She heard Blake face palm. "So my dear sister, Blake here lit slip that you and her bang, you know the bird and the bees. Fun In the bed, hotdog in the bun." She just kept going on for a good minute or two.

Stopping Yang put an arm around her sister waist, leaning in and whispering in her husky voice. "So I want to see it."
 
Ruby scoffed at the awful pun she had made and scrambled to pick up her book as Blake threw her face into her palm with a slight groan.

The Faunus' gaze shot right up however, ears twitching under their bow as Yang went right out and told Ruby that she had let it slip. She figured there'd be at least some vagueness or subtlety, though... It was Yang she was talking about. Her amber eyes shot to Ruby with an apologetic look as Yang spilled the beans.

Ruby's face went beet red and she gasped aloud as Yang revealed she knew her secret. "Wait Y-Yang I can exp- Nnhh?" Ruby was cut off as soon as Yang's strong arm wrapped around her waist and the blonde leaned in. Another chill shot up Ruby's spine at Yang's hot breath along with the husky voice that gave such a lewd suggestion, though this time was not from being creeped out.

"S-See what?" Ruby asked nervously, backing up against the bookshelf, already fighting off her arousal.
 
"You know what im talking about sis, your diiiiiiiiiiiiiiiiicccccccccccckkkkkkkkkkk." Yang said slyly a grin growing on her face, as she pulled away from Ruby, looking back her sister, whose face was starting to become bright red. Giggling Yang turned to look at her Faunus teammate, Blake semeed to be thinking of something perverted due to the look on her face and her blush as well.

Turning back to look at Ruby, who was currently still blushing madly. "Sis so easy to embarrass."
 
Ruby couldn't help but become aroused by the elongated way Yang said it, she was so crude and bold... And Ruby was starting to see why the guys - and some girls - liked it.

Still, being told to show off her... Her thing like that... Ruby's face flushed brighter and she covered her face. "Blaaaake why did you tell" she whined, as if trying to subconsciously divert the issue. Though as the Faunus merely offered a mouthed 'sorry', it seemed it wouldn't work and Ruby was backed into a corner.

"Wh-what... Here?" Ruby asked, looking around. When it was clear that she wasn't leaving this place without showing Yang what she wanted to see, Ruby sighed, defeated - there was no getting passed her big sister.

"F-fine... J-just hurry and look" Ruby said, looking to the right, to the left, before she reached under her skirt. The young Ruby hooked her thumbs into her pantyhose and panties, pulling them down a bit under the skirt before she nervously looked around again, gripping the hem. Slowly, Ruby lifted her skirt, her pale, now stiff as a board six incher was exposed to Yang. Her smooth pubis above, powerful little cock twitching above the still innocent looking pussy lips that now ever so slightly glistened with arousal.
 
Yang giggled like a child on caffeine, "its so small... But I bet it still a good little cum producers. Are those ball." She noticed the outline of testicles in the panties. "Wow I guess the dust gave you the full package." Yang smiled as she put a finger to her chin tapping it. "Well I guess its big sisters job to check it out." She said full of glee, as she grabbed Ruby by her shoulder leading her to the back of library out of the sight of the librarian.

Blake followed closely behind.
 
Ruby blushed bright as her sister called her small. She thought it was sorta big... Though she had no previous experience to compare it to, and Blake's was bigger. Though Yang noticing her little balls helped her not feel completely inadequate, even if she really wasn't sure why. Yang just made it sound like a good thing so she went with it.

The dark haired girl gasped as she was grabbed and lead to the back of the library, an enclosed space of shelves where no one was currently, and where the librarian couldn't see them. She looked back to Blake with a confused look not sure what Yang had planned for her.

"S-Sis?" Ruby quietly stuttered, her cock harder than before and pitching up her skirt.
 
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