Lab Experiment [EAENIDU]

[Kuragari]

Name: Shiloh Hart
Gender: Born Male, Now Female
Appearance: https://us.rule34.xxx//samples/7617/sample_189e5b19c3b9313731c9e7888e5e6a36.jpg?8691005
Bio: Shiloh grew up with mostly just his older sister around, at least as far as he could remember she was the only one around. So he knew she was a little out there, and by that that she was a complete nutcase but smarter than anything. She was a true mad scientist but he loved her, even if he had woken to some strange things, like explosions, or a wave of pink gas that had him masturbating and even taking his ass with his fingers for the entire day. So when he woke up to not being in his bed he thought just anything weird mishap, until he sat up and felt the huge and heavy tits on his chest bounce and then looked up and around and saw his absolutely massive sister what the fuck?!

Your sister giggled and chortled, her glasses being a bit unskewed right now as she leaned in closer and picked you up, turning you this way and that. "Mmhm, the transformation worked just fine~ And you're even rather cute... mhm... I'm tempted to leave ya as a Mousey girl even when I return you to full size... you just look so cute and snuggly and fuckable~"

She set you back down on the table, grinning madly as she said, "You're gonna help me with my newest experiment little bro~! Its gonna be so much fun~!" She has yet to state what the experiment will be, though with your current state being as it is...

[eaenidu]

I blinked a wiggled a bit in surprise as I was picked up and turned over and under "W~What~?!" I yelled in shock as my new tits smacked my face as I was forced through something much more scary than any roller coaster before getting set back down and looked around, trying to figure out where I was and what that experiment might be. "W~Wait what wasn't this the experiment, what more could you want to do to me?" I asked, but well I wasn't sure if she heard me, I was so small now that she seemed crazily far away.

[Kuragari]

She just giggles and tells you to stay put, then brings over a cage. Which she quickly puts you inside where you see a rat whose nearly twice your size... is also anthromorphic like you... but unlike you, she's sporting a massive dick and its now pointing at you.

"Alrighty, I got my notebook and my favorite squiggly pen, let's let the first part of my experiment commense~ Go ahead Ratilda~!" She says as the Rat begins to advance towards you, her eyes lustfully and eagerly taking in your form as she chittered huskily.

[eaenidu]

I blinked and looked around the cage I was suddenly in, and then looked and saw the massive rat girl who was towering over me and let out a confused squeak. Then I saw the massive hard dick and heavy swinging balls and let out a much louder squeak of fear turning and on pure instinct on all fours I scrambled around the cage and tried to find a way out, before I got caught.

[Kuragari]

This just made your sister giggle as you quickly tired yourself out, the larger rat bemusedly stomping after you until finally you got tired out and cornered. Then you had the futa rat's cock pressed against your body and rubbing against you, its heat and scent washing over you and your body tingling and growing warm in response.

[eaenidu]

I had tried the bars at a couple points climbing or squeezing through them, neither worked, and the longer I moved the more tired I got, my body was so small it was hard to move and the cage was cold and didn't help and soon enough I was panting and shaking face down ass up, and then something massive rubbed along my body, something huge and then I was squeaking and shaking my ass and panting in need as my pussy started leaking enough pheromones that I wouldn't be surprised if my sister could smell them! Why was my insides so hot~

[Kuragari]

"Good bitch." The Rat said, and then plunged her cock into you and your mind spun and twirled and was promptly dunked a good thirty feet into other rapturous euphoria. You felt good. Better than good. In this moment, it felt to you almost like you'd found your calling. A cock buried inside your pussy and its tip pushing at your cervix, your womb screaming with delight at the thought of being bathed in baby batter.

And that was just from the first thrust! The feelings increased as she began to rut into you, mounted atop you as her own breasts pressed into your back and she loomed over your entire being.

[eaenidu]

I shuddered and moaned a little as she called me a good bitch, why, I couldn't say, it just felt good and made my insides clinch up pleasantly. And Then she was was inside me and my back was arching in pleasure, my eyes rolling up and I found myself staring up at my sister my mouth open as I came hard, harder than I ever had before, harder than when she'd let out the sex gas even! And I knew the Rat had more to give me, because I hadn't felt her balls, I was cumming every time as she push against my cervix my body getting more and more hot, more of my pheromones were leaking out, begging the rat to bread me~ And I found myself wanting to be bred more and more~

[Kuragari]

"Ooooh, you look like you're enjoying it~" Your sister said with a giggle, jotting some things down as you felt the rat finally breach just a bit into your womb as you felt her balls finally smack into your hips. You could hear a soft shlicking sound, letting you know she was pleasuring herself too. "Hows their cock little sis~?"

[eaenidu]

I let out little mousy moans and squeaks of pleasure as my tail wrapped around the rat's waist as she slowly, steadily, forced her cock deeper and deeper, spreading my pussy, my cervix and my womb more and more the heavy balls slapping me more and more "Love it~ I~I'm a breeder~ W~Wanna Breed~ W~Want more~ Wreck me~ Ruin Womb~ So Good~ babies~ I~I wanna be an O~Onahole~ So Good~ P~Pussy~" I felt like I was going crazy as lewd words spewed from my lips.

[Kuragari]

Your sister giggled and chortled, jotting notes down as the rat indeed continued to rut at you. You in the mean time were practically cumming every three to six thrusts she made, and she was doing alot of thrusting. When the rat came, she kept going, and didn't stop until she'd dumped three more loads into your womb, your belly bloated with cum as she then flopped onto her side with you still impaled on her cock, and fell asleep.

Your sister gave you about ten minutes before she gave your breasts a light poke with her pencil. "And how would you say you are doing now little sis~?"

[eaenidu]

I shuddered and came when she poked me "G~G~o~o~o~d~d~d~" I managed to moan out, my pussy eagerly using the chance to try and milk more from the rat currently in it, I couldn't answer more than that, mostly because she just kept me from passing out myself, all I could do was give her a fuck drunk smile, and cuddle more into my warm lovers body, my pussy and cervix eagerly clinging to her pole, as I squeaked and tried to settle in for a nap if my sister didn't stop me.

[Kuragari]

"Mhm, someone's a sleepy mouse... hehe, well, I'll see you when ya wake up... assuming you aren't getting fucked again~" She giggles and turns the lights out so you can more easily rest in the cage, and you drift off to sleep for a bit. When you awaken though, you are on your back, the rat is fucking you again, albeit more lazily, and she's groping at your breasts as she smirks down at your belly still swollen with cum.

[eaenidu]

I Hummed sleepily, happily drifting off into the warm embrace, and then suddenly I was waking up on my back, heavy balls slapping my ass over and over as the cock inside of me shoved in and out of my womb easily, lazily even and I found myself moaning again, and that was before I registered the new pleasure from my tits, a whole new form of pleasure, and to my new and improved nose, well, all I could smell was my own heat scent and my rat lovers cock smell, and I was getting horning again, my mind stuck playing catch up as I was fucked like a piece of property.

[Kuragari]

"Mhm, good breeder... gonna have lots of babies." She says with a smile as she slowly fucks you, giving your breasts a light smack. "Can smell it, you a mama now... gonna be lots of little ones soon~" As she said this, your sister came on in and smiled as she said, "Heya little sis~ Mhm, so, enjoying the experiment thus far~?" She then brightens a bit and asks, "Oh yeah~! Can you understand the things my rat is saying~? Or is it all squeaks~?"

[eaenidu]

I shuddered feeling the weirdest mix of fear, pride, affection, pleasure, submission and so many other things that when she slapped my tits I came my pussy tightening around her. Part of me, part of me was saying it was natural, normal, she was big, she had a cock, she wanted to breed me, I was her breeder now, I didn't have the choice, she was dominant, I'd have as many little ones as she wanted and there was nothing I could do~ When my sister came in smiling and watching me get fucked I moaned and came again, her rat's cock stirring up my sensitive pussy as she asked her her first question, then I was distracted by the second "W~What of course I understand her, she just called me a good breeder and can smell I'm a mama now right before you walked in, why wouldn't I understand her?" I asked confused at my sister, trying to use her as something other to focus on than pleasure.

[Kuragari]

"Well, I can't. I still just hear squeaks~" She replied cheerfully enough as she chuckled and watched, humming a bit as she said, "Good that you're pregnant already though. If the other stuff works out, should be giving birth within a weeks time then~ After that, I can turn ya back to normal size... though I think I'll keep ya as a mousy girl. You're just so much cuter that way~"

The rat futa paid your sister no mind, simply fucking you still before she briefly forced a deep kiss on you, then went for both your nipples at the same time as she started fucking you a bit faster.

[eaenidu]

I opened my mouth to say something, anything in response to that, only to suddenly find myself sucking on the rat futa's tongue as she forced me into a deep kiss, and then tugged on my nipples, and I let out one of the sluttiest sounding moans I'd ever heard as my arms and legs instinctively tried to wrap around her as I was fucked, cumming from the kiss and titty teasing, a delirious part of me was giggling about how my pussy was happily squeezing and pleasuring the huge rat cock even when I wasn't cumming like my new hole was made solely to pleasure cock.

[Kuragari]

"mhm, did you want to say something little sis?" Your Sister asked with a giggle, seeming to enjoy watching you getting fucked like this and being made to feel such intense pleasures. She added to it by reaching in and scratching at your ears, which damnit all, was both embarrassing and felt really nice on top of what you were already feeling.

[eaenidu]

I couldn't say anything, but, well, I found myself moaning more, and cumming harder, I could feel my new plump ass jiggling with ever slam of her heavy rat balls into them, I could felt my whole body shake, shiver and cum, that by the time the kiss finally broke all I could do was stutter "B~Breed~ B~Babies~ B~Breed~ R~Rat Cock~ so big~ use me~" I wasn't trying to beg for more rat dick and her babies, but well, that's what my disorganized and disjointed words sounded like.