The Erotic Mind-Control Story Archive

Fermi’s Parasite

Chapter 1

* * *

Dr. Ned Fermi held a PhD in Microbiology and was a college professor at Red Oak University. This is not his story.

It is, however, the story of what he unknowingly unleashed upon the world. For it was one day, while teaching a lab, a student accidentally let fall a few drops of a sample of a microscopic parasite. This wouldn’t have been too much cause for alarm, as the parasites used in the lab had been neutralized, except that some of the sample landed on Dr. Fermi’s pants and mixed with another solution that had fallen there.

Microscopic populations can go through multiple generations within a day, and with this rate of reproduction also comes an accelerated rate of mutation and evolution. The parasites managed to survive and mingle with the solution, and their descendants managed to make their way past the fabric of Dr. Fermi’s pants and to his genitals, where they found the perfect climate to fester within.

By the time Ned Fermi was leaving campus for the day, the parasites had mingled with his sperm, and evolved into something completely new. Without even realizing it, the good doctor was now host to a brand new species.

To call this a one in a million chance would be generous. In point of fact, the odds of something like this happening were so astronomically low that they could reasonably have been considered impossible. And yet, here we are.

But let us turn our attention away from the doctor currently trying to ignore an uncomfortably distracting erection while driving, and towards the family that lived in the condo next to his…

* * *

“Lacey, have you done your homework yet?”

Lacey Chapman was a high school senior and something of a bookworm. She enjoyed studying and puzzling out homework questions, and was a member of her school chess club. That did not mean, however, that she could not be stumped.

“Not yet, mom,” she called back. AP Biology was proving to be a difficult class for her. For some reason, she simply had difficulty wrapping her head around the subject. It wasn’t simple like math at all. “I may need some help on this stuff.”

Her mother, standing in the kitchen and fixing dinner, sighed. She certainly wouldn’t be able to help her daughter with her homework. Luckily, she saw Dr. Fermi’s car through the window, pulling into his driveway. “Perhaps you should ask Mr. Fermi to help you?”

Lacey nodded, despite not being in the same room as her mother. She did like the professor. He’d helped her many times throughout high school. Truth be told, his tutelage gave her an academic edge that had helped her distinguish herself from her classmates.

“After dinner, though!” Lacey’s mom called. “It’s almost ready.”

* * *

After dinner, Lacey left to go see Dr. Fermi. She stepped past her brother playing video games on the couch, and said goodbye to her father as she passed him in the hall, and made her way to Fermi’s condo.

In the time since he had arrived home, Dr. Fermi had become very horny. It had been barely an hour and he had masturbated to climax three times already. He was just cleaning up the most recent mess, hoping that this would finally calm him down, when he heard the doorbell ring.

Upon answering the door, Dr. Fermi was greeted by the sight of his 18-year old neighbor. She was dressed conservatively as always; a sensible plaid skirt and a white blouse under a pastel pink sweater. Her brown hair was pulled back in a ponytail, and her brown eyes looked up at him from behind square-rimmed glasses, surrounded by a light dusting of freckles.

“Hello, Lacey,” Dr. Fermi said, steeling himself. He wasn’t quite calmed down yet, but this girl was twenty years his junior and he would absolutely not allow himself to entertain any lewd thoughts about her. At least, that’s what he told himself as his eyes examined her body. She’d filled out nicely these past few years, hadn’t she? No! He forced himself to look at her face. “How can I help?”

“I’m having trouble with AP Bio, and I was hoping you could walk me through it?”

Dr. Fermi’s first instinct was to say no, but it simply wasn’t in his nature to turn down a student in need. He invited her in, and closed the door behind her.

Since their initial manifestation, the parasites within Fermi’s body had multiplied and spread throughout his system. By bonding with his DNA, they had somehow managed to fool his immune system, and so had free reign throughout his body. Even now, the parasites were attacking Dr. Fermi’s mind, subtly altering his perceptions and thought processes.

Even worse, the parasites had escaped his body. Each time he had ejaculated while masturbating, they had infested his cum. They spread out from wherever his seed had spilled, and were now beginning to emerge from other orifices; sweat pores, his mouth, his nose.

The parasites were parasites were becoming airborne, and what’s more, the larval forms of the parasites lacked Fermi’s DNA imprint, instead possessing the ability to imprint the DNA of any host they came into contact with.

As he sat at the table with Lacey, leaning over to look at her work, being so close to her, Dr. Fermi slowly became more aroused, more aware of the young woman in his presence. He wrestled with himself and his impure thoughts, and his heart beat fast in his chest, and he sweated.

And as he did, the parasites made their way from his body, to Lacey’s. Even as the doctor was struggling with his newfound lust for the teenager, she was herself becoming more aroused. She could feel her nipples hardening against her bra, and a wetness growing between her legs. Her face was hot, and she couldn’t help but notice the way Dr. Fermi seemed to keep looking at her. At first she was alarmed, but as the parasites attacked her brain, she became flattered and, what’s more, very fucking horny.

So it was that when Dr. Fermi reached over to point something out on the page and his arm brushed against Lacey’s breast, both of them were very aware of it. They froze, and their eyes locked on each other’s, and Dr. Fermi knew in that moment that the jig was up.

“Lacey…” he began, and then he couldn’t think of where to go next. How could he tell this supple and beautiful creature to leave his presence? Not when she was here, ripe for the taking, and he wanted her so very badly.

He struggled, but his inner struggle was broken when Lacey leaned into his arm. Gently, she took his hand and placed it on her chest.

“Please,” she said. “More.”

This was exciting! Lacey had only had sex once before, with an ex-boyfriend who’d had no idea what he was doing. She’d never even entertained the thought of doing it with an older man. It was so… wrong! So dirty! She couldn’t help but feel a thrill as she thought about what they were about to do.

Dr. Fermi squeezed. The girl’s tit was so soft, so firm. With his other hand, he cupped her cheek and then he leaned in and kissed her.

Lacey leaned into the kiss. She parted her lips and the tongues of the two forbidden lovers danced together. They breathed into one another and Dr. Fermi’s hands roamed her body. She reached out a hand and grasped at his crotch, and suddenly he was lifting her up and laying her on the table. She giggled and knocked the books out of the way. Who needed those? All that mattered, here and now, was getting fucked.

Fermi shoved his hand down her skirt and pulled at her panties as hard as he could. He was rewarded by their sudden ripping as the wet girl beneath him squealed in excitement. He tossed them aside and leaned over, kissing her forcefully. One hand kneaded her breasts, and his fingers snaked beneath her sweater and blouse and bra and pinched at her nipple. His other hand worked at his own zipper.

He climbed on the table as his pants fell about his ankles. His cock, long and hard, sprang from his boxers. Lacey wrapped her fingers around and started stroking as kissed the professor back. Her free hand alternated between grabbing his neck and pulling at her blouse. A button popped off as she pulled too forcefully, but she was beyond caring.

Suddenly, Fermi pulled back and took his dick from her hand. Lacey had just enough time to pout before he guided his member to her slick wet entrance and entered her.

She screamed. The parasites in her brain shot signals of pleasure through her whole body as the professor wonderful cock pounded into her. She could only gasp and moan and wrap her legs around him and grab his back as he thrusted into her again and again and again.

The professor looked down the girl beneath him and smirked between pants. Her eyes were rolling to the back of her head and her whole body seemed to shake with every thrust. Lacey’s glasses were glasses her lopsided on her face, knocked out of place by the burst of physical activity.

He brought her face down and shoved his tongue into her mouth, and she eagerly received him, moaning into the older man as he fucked her.

Fermi felt the pressure building and grabbed Lacey by the throat. “I’m about to cum, little girl,” he growled. “I’m going to cum all inside your tight little cunt.”

Lacey could only moan “yeeeeessss” in response. This was all Fermi needed to hear. He unloaded into her teenage pussy, and as she felt him filling her with his cum, her whole body convulsed and she climaxed screaming in bliss and pleasure.

For a moment, the two could only lay on the table, panting. The rush from sex had energized the parasites as well, and the minds of both Dr. Fermi and Lacey had been permanently, irrevocably altered.

After she caught her breath, Lacey gasped “thank you.”

“No problem,” Dr. Fermi chuckled. All doubts and conflict had left his mind. This was sex. It was natural and good and desirable. It was needed.

Yes… needed. Everybody should experience it.

“Could we… do more?” Lacey asked.

Dr. Fermi smiled at the girl, and it was all she could do not to melt into the balding, older man above her. This wonderful man with his wonderful cock who fucked her and made all the problems of the world disappear.

“Of course,” he said. “But perhaps the bedroom? I don’t want to break my table.”

Lacey giggled. “Of course, professor.”

His cock started hardening again, hearing that. “Come on,” he said, standing up and unbuttoning his shirt. “Follow me, and take those damn clothes off.”

Lacey could only laugh and do as he said.

* * *

It was past 10, and Dina Chapman had been starting to worry. Her daughter had been over at Professor Fermi’s for some time. She decided to head over there and see what was taking so long. Surely Lacey was done with her homework by now?

She rang the doorbell, and stood there, waiting. After a moment, she rang the doorbell again. This was strange. She was starting to feel… excited? No. She had to just be anxious.

Little did she know that the condo she standing in front of had become completely infested with parasites. And some had already managed to make it out to her. And she was about to receive an even bigger dose.

Dr. Fermi had enough presence of mind to dress himself… mostly… before opening the door. What he beheld was Lacey’s mother, Dinah. She was blonde, unlike her daughter, with her hair cut short in that “soccer mom” style. Her tits weren’t as large as Lacey’s, but he still couldn’t help but be eager to play with then.

For her part, Dinah was completely taken aback by the man who opened the door. Professor Fermi stood there in an open shirt and boxers and nothing else, and she could see and erection jutting out from beneath his underpants. She opened her mouth to scream, but Fermi grabbed her face before she could.

“Shh…” he said. “I want to show you something.”

His hand smelled strange. Dinah was starting to feel light-headed. What was going on? She couldn’t focus, and her body felt like it was on fire. She couldn’t even resist when Fermi took her by the shoulder and guided her inside his condo.

Lacey came walking out of the bedroom at that point, and Dinah saw with shock that her daughter was completely naked, except for her glasses (Fermi had decided her liked them).

“Hi mom!” Lacey said. “I’m sorry I’m late coming home, but Professor Fermi was fucking me soooo gooood.”

Dinah was suddenly aware that Fermi’s hand was no longer on her mouth. “What….” She gasped. “Is going… on…oh!”

Behind her, Fermi grabbed her ass and squeezed. She jumped in shock and pleasure and nearly fell over. Luckily, her daughter caught her.

“Don’t worry mom,” Lacey said. “You’ll understand soon. This is… natural.”

And her daughter kissed her, straight on the lips. She shoved her tongue down her mother’s throat, and Dinah was surprised to find herself responding. She kissed her daughter back, and felt her hands rise up almost on their own accord to explore Lacey’s body. She cupped the girl’s tit; it was so big. She was so proud of the beautiful young woman Lacey had blossomed into!

She moaned into Lacey’s mouth as she felt Fermi caress her own body, and start undoing her pants. Before Dinah knew it, Lacey and Fermi had stripped her of her clothes, and she was on her hands and knees, kissing and fondling her teenage daughter as Fermi pumped that glorious cock of his into her quivering pussy.

“See, mom?” Lacey whispered between kisses. “It’s good. This is what you want.” And she crawled up and away from her mom, before stopping and spreading her legs so that Dinah was looking right at her little girl’s cunt. And there was so much… delicious… looking… cum flowing out of it.

She could feel her mouth water as she leaned down and kissed her daughter’s pussy. Then she tentatively brought an exploring into its folds. And soon she was eating out her daughter’s wet cunt with reckless abandon, as her next-door neighbor plowed her own pussy.

“Yes, mommy!” Lacey grasped. She was grabbing her own tits and pinching her nipples as her mom ate her out. “That’s good! That’s sooooo gooood!”

It was heaven. It was perfection. Dinah couldn’t say how long she was there. Everything began to blur together. Her daughter ate her out while Fermi fucked her cunt. She bounced on top of Fermi’s cock while Lacey sat on his face. She kissed him passionately while he fucked her daughter’s ass.

It was all perfect, but eventually all things must come to an end. Fermi was spent. He fell asleep on his couch, leaving mother and daughter, both naked, both covered in sweat and cum, to kiss and caress one another.

“We should clean up,” Dinah said. “We should go home. Your father and brother will wonder where we went.”

Lacey smiled and flicked her mom’s nipple with her tongue. “Maybe we should show them?”

Dinah laughed. “I’m so glad we’ve found something to enjoy together.”

They giggled and cleaned themselves up and got dressed in what still intact clothes they could find. Finally, as it approached midnight, the pair headed home, the parasites having fully altered their brains, their mouths salivating at the thought of the juicy cocks that awaited them.