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Sisterly Experiments (Peekaboo x ChrisGabriel)

P

Peekaboo

Supernova
Joined
Sep 25, 2010
Tanya couldn't take the grin off her face as she drove down the empty road heading out of town, her eyes darting between the road and the ever closer trail of smoke they were headed towards, totally ignoring her younger sister in the passenger seat that she had dragged along. Tanya was currently in college, studying towards her PhD in Genetics, she was working on projects involving genetic manipulation, though her scientific curiosity extended into other areas aswell, which was what brought her out here tonight. Whilst stargazing, something she often did to relax and think, Tanya had spotted what almost seemed like a shooting star, but had turned out to be some kind of meteorite or something crashing down from space. Fortunately they lived in a relatively small town so nobody else seemed to have noticed the event.

"Ok, we're here!" Tanya suddenly pulled into a field, driving through the grass until they got near to a crater, immediately, and suddenly, stopping the car and climbing out, moving toward the crater, though not quite the edge. "Hmmm.....still warm, but not burningly hot..." Tanya nodded, immediately pulling out her notebook and beginning to scribble things down. "Now to wait for the smoke to clear and we can get a better look...." She smirked, then glanced back at the car where her sister still was. "Hey! Get your ass out here and take a look at this will you?"
 
"Okay, okay, I am coming!" replied her sister Tamara. Playing with her old Tetris she wandered over to her. This little trip out of the house was not to her liking, her sister removed her from front of the television, where she just started to wach cartoons. But her studious sister had to follow that line in the sky, and she had to come with her babysitter too. Tamara usually wanted nothing more, just to be left alone, but when their parents left, she had to be with her older sister at home, when not in high school.

"This sucks!" she cried out, when another building block reached the top, and she lost the game. Throwing a tantrum, she wandered too near the hole, almost falling into the crater. "Ooops!" she stopped, trying to look down too. "Hey, do you think that ET would like my old game?" she asked before throwing in the box from her hands. She liked to rile up her older sister!
 
Tanya twitched when Tamara seemed to throw her little tantrum, glaring at her younger sister. "Start acting your age Tamara! You're in high school, not a kid anymore! Ugh......looks like I definately ended up with all of the brains in this family huh....?" The girl sighed and shook her head, looking back to the crater. "Don't be an idiot Tamara, there's no alien down there, it's a piece of space rock....or could be a piece of junk leftover in orbit from some old satellite or something......" She waved a hand to try and clear some of the smoke. "Hmmm.....come on....hurry up and clear will you?"

The girl frowned and adjusted her glasses before scribbling down some more things in her notebook, paying little or no attention to what her sister was doing. "Just be careful not to fall in or anything will you? I don't want to have to drag your ass out of there...."
 
"Yes, mother!" was the answer, and Tamara sat down where she stood before. Her legs dangling in the hole, she turned to her sister. "Hey, sis! Feels like a turkish bath on fire! All humid and warm inside. Maybe there is some water down..." she tried to peer into the crater, but the light breeze turned, and she got the smoke fully into her face.

Coughing she tried to leave, but her left foot slipped, and she found herself on her front, dangling more into the hole. "Sis! HELP!" she coughed out, slowly sliding down from the movement of her torso. The smoke cleared up finally, and her eyes contacted her sisters for a moment. "Help me..." she cried out, her hands clawing at the earth.
 
Tanya was just in the middle of writing some notes, ignoring Tamara's 'mother' comment and her little comment about the heat. "Of course it's hot, it just came from orbit.....it's going to be hot for a while now..." She muttered, then looked up when she suddenly heard a call for help. "Tamara...?" She blinked, then gasped and suddenly scrambled over, trying to reach over the edge of the crater for her sister.

"I told you to be careful!" She stretched over the edge, being careful not to go too far otherwise they'd both go. "Ok....almost.....almost got you..." Tanya stretched just a little more, but a moment before she could grasp her sisters hand, the ground beneath Tamara seemed to crumble and sent her tumbling further down the crater.
 
"Nooo!" she cried out, as her feet lost all ground, and she started to fall down. For a moment she thought that se would die, then she splashed into some hot fluid, that couldn't be water... All of her clothes started to hiss and dissolve. She tried to call out for her sister, but the humid and hot air removed her ability to speak, almost scalding her throat. She tried to leave the ooze, but it was really slippery.
 
"Tamara!" Tanya stried to wave the smoke out of the way, but there was far too much of it. She couldn't even hear her sisters voice by this point.

Down in the pit, a thick, slimy ooze was pouring from the meteorite. When Tamara fell into it, it seemed to cling to her skin for a moment, before beginning to dissolve away her clothing. Once the girl was naked however, the ooze seemed to....move. It suddenly shot up, wrapping around Tamara's body and engulfing her completely, encasing her for a moment, before it suddenly started to force its way inside of her. Some forced its way down her throat, whilst more forced itself up both of her lower holes. In a few moments, all of the thick fluid had entered Tamara's body, though it left her seemingly the same as before, though naked.
The heat was gone now, the smoke beginning to clear, leaving Tamara in the crater with what looked like a regular rock.
 
She looked around, the heat gone from the outside... but now she felt heat inside! Falling into a little shock, she felt her holes dilating and closing again... Tamara wanted to cry out, but was unable to, as something slithered in her throat, making her first gag, then just feel like a hole opened straight into her insides. She tried to feel around her naked body, but only hot earth and scalding stones remained. Her ass and pussy throbbed, and she felt them too, only to have her hands pulled then pushed by something moving inside her. Then all was silent, nothing moving, until her clitoris and nipples started to feel much hotter, throbbing, like her holes before.

Tamara could finally cry out. "HELP" she tried to say, but her vocal cords was not that good working, so it sounded nothing like her wanted screech. Then the hotness inside her again surged, making her want to puke, and struggled with the need to go to the toilet to. Then her three holes and three nubs exploded out with strands of silk like material, closing around her and making a stone like coccoon. She lost her consciousness and dreamed of alien thoughts.
 
Tanya had returned to the car by this point, rumaging around in her trunk before finding a tow cable. "And dad said I'd never need this...." She grumbled and started the engine, moving the car closer to the edge of the crater before putting on the brakes. "Ok...." She moved to tie the tow cable around the bumper of the car, then tossed it down into the crater. The smoke at the bottom had cleared, but up at the top it was still thick, blocking Tanya from seeing into the crater. "Hey! Hey Tamara! Grab the rope will you!" The girl folded her arms, waiting for some kind of response, any kind.

"Damnit.....little sister.....always so much trouble...." She grumbled and then grabbed the rope, looping it around her arm before starting to lower herself slowly down the sides of the crater, the ground already starting to cool.
 
Down there something throbbed inside the coccoon. Some kind of appendage pushed at the surface, only to pull back, and try at another place. The whole thing looked like a big stone with something trying to get out. Slowly, it deflated, became a throbbing bag of spiderweb like material, until it started to dissolve like Tamara's clothes before.

And just as before, there lay the girl nude, not a hair on her body, only skin, and something moving between her legs. Three something... The tentacles pulled back slowly into her openings, leaving two new flesh sacks on her.
When her sister finally arrived, there was only the two big and slowly inflating alien flesh pods apparent. Tamara's hair was also gone, her eyebrows too, but her lashes moved on their own accord a little. The last movements of the throbbing nipples gone too. And about her clitoris? Well, there was the two surprise for the family...
 
Tanya coughed as she moved through the smoke, then gasped at the odd sight before her. She reached the bottom of the crater and saw the odd cocoon "What the...?" The girl reached out to touch it....it felt like silk....definately fabric of some kind....organic. Before she could examine it anymore however, it suddenly deflated, then dissolved away, revealing Tamara within. "What the hell....?" Tanya frowned and watched, her sisters body seeming rather....different, though Tanya was focused on her sisters head at first, kneeling down beside her and not noticing what was happening with Tamara's lower body.

"Tamara....?" Tanya reached out, gently shaking Tamara's shoulder. "Tamara can you hear me? Geez.....the heat must've burned away your clothes and hair.....though that cocoon....what the hell was that...."
 
"Sis?" Tamara slowly opened her eyes, hearing the known sounds of her sister speaking. She felt hot, and her whole body throbbed "I think I have a fever." She remembered the dreams of alien worlds, but like a distant memory. Somehow she felt her sister, and it was like she felt her body and knew it too, like she could se it without clothes, and feel the silken skin under her... fingers? But the shaking of her shoulders make her sick.

"Stop it! Don't shake me!" next she tried to remeber what happened. Yes, she lost her step, and then fallen into ... some kind of tarn? Then there was the hotness, around her, and ... her clothes! It got under her clothes, and there was something she could not remember, but now she was without her clothes! "I am.. naked?" she lost her consciousness, just when the two pods fully gorged with blood got into contact with her older sister's body, and Tanya touched them with her hands.
 
Tanya blinked as her sister seemed to speak, then just....passed out. "Hmm...." The girl frowned, then looked over her sister, raising an eyebrow at what she saw between Tamara's legs.....two proud erections....two proud large erections.....they were nearly reaching up to Tamara's face and each one was about twice the thickness of Tamara's own arms. "Well....this is....interesting...."

The scientist in Tanya was taking over, her hands moving to gently grasp each of the cocks, squeezing them firmly. "Definately real....feels normal like a human male.....where could this have come from...." She continued to look over Tanya's new form as she moved her hands gently from the base of the shafts to the top.
 
The shafts throbbed in her hands, and seemed to get fully erect, causing Tamara to moan and move her hips. Their base joined the younger girl at her pussy lips, growing out from both sides of her clitoris. When touched, the little nubbin between them seemed to retract fully, and both cocks trembled. When her hands reached the top, both cock felt wet, a clear drop of something like precum helping the exploration. Tamara moaned again, pushing the cocks into her sisters hands for more.
 
"Hm....full sensation aswell it seems....very interesting....now just how could this have happened?" Tanya glanced at the meteorite, but it looked like any normal rock really, nothing special about it. "I'll have to question her when she wakes up..." Tanya looked back to her sister, starting to slide her hands slowly back and forth along the shafts of the girls two new cocks. "Though I think when she does wake up she's going to be freaking out rather than listening to me.....I wonder how small they'll get when they're flaccid....she might have trouble hiding them. Still.....I think I'll have to find out what caused this.....it could make my PhD...."
 
Tamara slowly recovered her consciousness, and she felt like somebody played with her nether lips while asleep. Her skin felt flushed, and there was something throbbing between her thights, and on her lower torso... It felt like two cocks! She opened her eyes, the darkness lighted from above them, and she seen her sister touching her... meaty cocks?
She could not speak, only watch and feel the hands of her older sister on her hot meat, and Tamara was really aroused. Her ... cocks .. had the blood thundering throught them, she felt like her clitoris got huge and become two of this...
"Oh my god!" she could keep silent no longer, her body pushing against the hands, and she felt like her holes and breasts wanted to explode too, not just her two ... "Cocks!" she dried out, and came, spraying thick and long strands of silky fluid out of her new additions.
Her ashole and pussy felt like they wanted to leave her for a moment, and she gagged at something in her throat, but then it was over, her new tails slowly pulsing in her sisters hands, and her nipples wanted to leave her, so she had to grab them in her smaller hands... and they wriggled in her palms!
"Sis! What have you done with me!"
 
Tanya looked to Tamara as she suddenly seemed to regain consciousness and react...well....about how one could probably expect. Before Tanya could really speak with her sister however, both cocks suddenly erupted with a thick white fluid, spraying all over Tamara's body from both gigantic cocks, inhuman amounts emptying from the girls body before Tanya released the cocks, watching as Tamara grasped at her nipples.

"Me? I didn't do a thing to you. I found you like this and was examining you. What do you remember?" Tanya raised an eyebrow, adjusting her glasses as she watched Tanya's hands. "What are you doing? Feeling yourself up? Well your breasts do look somewhat larger than before....."
 
"They are ... was moving... my nipples wormed!" she removed her wet hands, and looked closely at the fluid on them. Then she licked it. And slurped it down, looking for other patches of cum on herself to eat. "Yummy!"

The cocks deflated, and it seemed that her pussy gobbled up the smaller meat rods. Tamara opened her legs, and moaned, while the two cocks pushed inside her, third of their previous size, but normal for a man.

"Oh my god! It feels soo pervertly good!" she exclaimed, while her hands returned with more cum to lick.
 
"Moving?" Tanya raised an eyebrow and shook her head, then blinked as Tamara started to eat her cum and seemed to rather enjoy it. "Tanya....? Ok....come on, let's get you back home ok? And will you stop eating that stuff? I think I need to get you back to my lab at the university so I can run some tests....find out what happened to you..."
 
"Ok, ok, but it tasted great! Want some?" she asked, giving the last lick on her hands to her sister. Then she slowly get up, and tried to follow the way up the rope. "By the way, I am naked! And dont have any hair! And I am not panicking, jet... So you better do something before I start to cry..." and her mouth turned down, almost starting the crying, but they had to get out before she really had her mental crash.
 
"I don't want to taste it but...." Tanya took a petri dish from her pocket and scooped some of the cum from Tamara's hands, then sealed the dish. "Hmm....I'll have to analyse this...." She nodded, then pulled off her jacket, putting it around Tamara. "There, now I'll get you back to my lab and we can dosome tests on you.....just don't start crying ok?" She smiled softly, patting her sisters back.
 
They successfully got back from the shallow pit, even recovering the piece of fallen sky. All the way back to the lab Tamara was on the verge of crying, but somehow her underdressed state and bald head made her blush, and try to pull herself into a small ball of jacket in the seat. Her hands on her head, she just could not understand, where her hair had gone. Even her eyebrows, and all other hair from her body! It was a miracle she had eyelashes... even if they felt somehow funny to her. Her sister was lucky that she could not see herself in the mirror, that would make the younger girl cry for sure...
 
"Look just calm down will you Tamara? It'll be alright. Your body is mostly back to normal for the time being.....besides your hair will grow back, it was probably just the heat from in the crater that's all" Tanya shook her head as they drove back toward the town, quickly pulling up outside the college research building. "Come on, let's get you inside. I can take a blood sample and start analysing what's happened to you"
 
Tamara scurried after her sister, not wanting to get seen. Then she stays silent, until they arrive at their destination. "Was I calm enough, sis? Can I throw a tantrum now and cry out my heart?" she asked with great dramatic.

She kept the jacket closed with both hands, trying to pull it down to keep her pussy and ass covered too. What she could not - would not - see, that some of the curioser researcher was looking at them, not making the connection of the bald nude girl and their college little sister. They even followed them and asked Tanya, but the smaller girl scurrying fast into her lab left before any answer could be heard by the blushing and almost crying teenager.
 
"No, no tantrums and now crying, simple as that" Tanya led the girl into the lab, waving a hand to dismiss the others when they got close or tried to follow, before slamming shut the door to her lab, locking it shut behind them. "Alright, take a seat" Tanya walked over to one of the cupboards, pulling out a syringe. "I need to take a blood sample and then I can start figuring out what's happened to you"
 
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