Dr. Henrietta Jekyll looked at the many active projects she had laid out in her lab. Each used to demand fair amounts of her time. There were tests on fat burning supplements, new versions of food additives, moisturizers and even rejuvenation creams. She used to get excited about these projects but... no more. She now only thought about the Formula. Ever since she'd stumbled upon her great grandfathers old notebooks in her family home, she'd become obsessed with his projects. He too had been a scientist and from what she had gathered, quite the good one. She couldn't find any projects he'd been credited on but his notes had led her to leaps in her own work she never would have come up with.
It had sparked so many ideas for future projects and possibilities that she could barely sleep most nights. It was good that her roommate, Anna, was studying so hard for finals. Otherwise, Henrietta's coming and going so late would probably have caused an issue. Anna had been equally as fascinated by the notebooks. She, like Henrietta, was a grad student in biochemistry. The two had known each other since their undergrad and had become quite inseparable. Even the men in their lives couldn't break them up (what few men there had been).
Currently, Henrietta spent every night in the lab until almost dawn. She felt like she was so close to finishing the Formula. So close to recreating this lost treasure. The notebooks described it as the ultimate product for rejuvenation and vitality. She thought of how it could be marketed and sold and used and the possibilities just made her work harder. She would finally be taken seriously among her peers in the graduate program and eventually land the job she knew would get her family off of her back. Anna had been so supportive of her. She wished her boyfriend, Carl, had been half as helpful. Instead, Carl just came to the lab and shot holes in her theories so she'd go and have sex with him. When he'd get rejected, he'd "forget" to call her for a week or so. It was crushing. Henrietta would have left him if she thought she thought she could do any better.
As she took a moment to wash up before handling new chemicals, she examined herself in the mirror. She sighed at the reflection: Average height, brown hair she could do nothing with except pull in a ponytail, glasses, about 10lbs too many on her frame, and breasts that barely required a bra. Her teenage acne had left scarring and her waist could never wear a skirt properly. Anna wasn't a looker either. A mid-20s latina with curly hair that had to be tamed by a straighter every morning, lips that were constantly chapped and equally poor eyesight as Henrietta. Her breasts, while bigger than her roommates, were saggy and her thighs were too thick. The two of them were in a vicious cycle of feeling sorry for themselves and consuming sweets together to try to numb their body woes.
Henrietta returned to the lab and looked over what she'd spent the week on: a glass container housed a purple liquid that was pretty much all she could work out of the Formula. She wasn't sure what to do now. Maybe administer it to some of the lab animals and track the results... she was so tired. She could barely think. She just needed another drink of coffee, she thought. She chugged her caffeinated drink and was confused by the sweetness of it... and then realized that in her sleep-deprived state, she'd actually drank the Formula instead...
Henrietta began to panic. She'd run no tests and had no idea of what the side effects would be. She wasn't able to get much detail from the notebooks about what EXACTLY the Formula would do but... she hoped causing her liver to shut down wasn't one of the possibilities.
The door to the lab slammed shut and she could hear Carl stomp into the lab. He'd swung by again, it looked like, looking for another quickie. She didn't have the patience for this right now. She was too caught up in the Formula and what it might do to her, untested.
He tried to make the moves on her again, kissing her neck and rubbing her shoulders.
"C'mon... just come back to the apartment and we'll have some fun in your room."
She could feel herself get aroused (for a change) at his movements. Why was this suddenly working on her? Henrietta felt flushed and tingly all over.
"Ugh... Carl... I... don't. I'm not... jesus is it hot in here?"
"Babe... are you ok...?" She heard him say.
The changes hit suddenly... and without any further warning: Henrietta screamed and moaned as her skin felt like it was stretching. Her breasts were feeling fuller and larger, straining against her bra and blouse, her arms felt stronger and her hair seemed to flow out over her shoulders. She undid her ponytail to let her hair free and couldn't help pulling at her now constricting blouse. Her eyesight changed as well, her glasses no longer being necessary. She could feel her pants becoming too short and tighter than they once were. She pulled at them as well, tearing them like tissue paper. By the time the seizures stopped, she was breathing heavily in a voice that didn't sound like her anymore. It was husky and sultry and aroused beyond reason.
"Mmmm goddamit. That felt gooooood."
This new voice came with new thoughts and feelings... new urges. She wanted to fuck and screw and eat and drink... she wanted to tear off these stupid clothes and wear something hotter. She wanted to pound a bottle of bourbon, eat a steak and then have pornstar sex against a window. She wasn't Henrietta anymore... That was a silly name for a woman like this... She was Heidi.
Carl looked frightened. He'd seen the change happen and wasn't sure what to do. The woman before him in no way resembled his girlfriend. She was hotter, that was for sure. The way she was looking at him was almost like a predator looking at prey, getting ready for the kill.
"First things first," the woman said. "Gotta make sure I don't run out of this lovely stuff."
He watched as she poured a large container of purple solution into a series of water bottles and then placed them in Henrietta's backpack. The woman stopped and poured a few more.
"I think I know some other fun I can have with these..." She seemed to be saying this to no one in particular.
Carl muttered, "Henrietta... is that you?"
"No no darling. That mousy little twat you tried so hard to screw is away at the moment. I'm Heidi. Let's play."
The amazon before him pulled off her tattered slacks and tore away her strained blouse. The bra underneath was all but shredded as well and was discarded with the rest. She took the lab coat off with some care ("might be needing this" she said to herself) and then slid off her torn panties. Heidi hopped up on the lab counter and spread her legs, her pussy glistening with wetness. She started to play with it...
"Unf. Fuck, that feels good. I don't think Henrietta ever took time to service herself enough, do you, Carl? Maybe then, you'd've been able to get a piece."
She arched her back and moaned. "C'mon, big boy. Don't you want to see what it feels like now?"
Carl didn't hesitate. He stripped his clothes off and took up position between Heidi's legs. She grabbed his hair and pulled at it as he kissed her passionately. The raw animalistic noises she made as he groped and fondled her made him more and more hot. It was like she was giving off some kind... scent, as well. Every whiff made him more primal in his desires. He couldn't even articulate speech... just grunt and growl. Soon he was inside her, pumping and thrusting. He watched as she fondled her breasts in front of him and gritted her teeth.
"Yesss..." she moanted. "Just like that. Good boy. Fuck me like you've always wanted to!"
Carl kept it up and finally came hard and all over her chest. Heidi played with her clit while her other hand scooped up Carl's cum and she tasted it in front of him.
"Bet Henrietta never swallowed up such tasty treats huh?"
Carl just shook his head. He was thinking clearly again and was shocked at what had just happened.
"What... happened to you?" He stammered.
"Don't bother yourself with that" Heidi replied. "Looks like I'll be taking a break in a minute..."
With that, Heidi's voice trailed off and she stretched like a large jungle cat. As she sat up, her body started to return to that of Henrietta's. Her skin and hair becoming normal, her breasts shrinking, her legs getting shorter, and she squinted and looked around for her glasses frantically. With that, she grabbed the lab coat that had been discarded on the floor and wrapped it around her, covering herself.
"Omigod..." She said. "What... was that..."
