. 01

Author's Note:

This story is a fun commission from one of my awesome Patrons. Standard disclaimer applies: this story contains fictional depictions of erotic scenarios, so act accordingly! All characters are at least eighteen, all situations are entirely fictional, and any resemblance to any real-life individuals or situations is entirely coincidental. Copyright Fidget, 2025. All rights reserved. Enjoy!

Perfect Girlfriend Juice

by Fidget

Chapter 7: Cultivating a Fertile Workplace Relationship (Parts 1 and 2)

Part 1

Derek had had all that he could stand of his coworker, Michelle. Even since joining the company the previous year, she'd been a constant thorn in his side, insulting and belittling him privately while loudly contradicting and undermining him in front of their boss.

Michelle was also a compulsive brown-noser, but while she took every opportunity to suck up to management, Derek grudgingly respected the fact that she never lowered herself to shamelessly flirting with their boss the way other coworkers of his had in the past. And she definitely could have if she'd wanted to: she didn't have much in the way of curves, and she hid what little she did have under power suits, but she was pretty enough.

In short, it was clear - to Derek at least - that Michelle was trying to make him look bad so that she'd be first in line for the next promotion even though Derek had seniority. And to be honest, while he couldn't help but hate her for the way she treated him, he understood why she was doing it. He'd sacrificed a lot to get where he was as well, and while he was well paid, his devotion to his job gave him practically no free time to enjoy his money, and he hadn't had a long-term relationship in almost a decade.

Still, even if he could understand Michelle's motivations, he'd had all he could take of her bullying, and he began to keep his eyes open for a way to get her off his back for good. So, when he came across an ad for "Perfect Girlfriend Juice" on the web one evening, promising to change his worst enemy into whomever and whatever he wanted her to be, he impulsively ordered some. He didn't actually expect it to work as advertised - that was impossible, of course - but he hoped that whatever its effects were, it would give her enough indigestion to keep her off his back for a few days.

The tacky, brightly colored can of energy drink arrived a few days later, and Derek surreptitiously stored it in his desk while he waited for the opportunity to put it to use.

His chance came a couple of weeks later. Their boss had finally tired of their constant bickering as well, and so his solution was to order Derek and Michelle to work extra late one night on the same project together, hoping that spending an extended amount of time in each other's company would somehow force the two to work out their differences.

The evening in question started off much as expected, with Michelle constantly insulting Derek's ideas for the project and claiming that his idiocy must be the reason why he couldn't keep a steady girlfriend.

So, by the time Michelle took a restroom break an hour or so into their work session, Derek was just incensed enough to throw caution to the wind, retrieve the can from his desk, pop the cap, and pour a significant portion of the Juice into the cup of diet soda Michelle took with her wherever she went.

A few minutes after she returned from the restroom Derek watched anxiously as Michelle took a long swig from her cup, and from the disgusted look on her face, it was clear that she'd immediately noticed the strong bubble gum flavor underneath the expected metallic twang of aspartame.

Well, it's too late now

.

Michelle was initially shocked by the strange, sickly-sweet flavor, and she felt a wave of dizziness pass through her as an odd sensation of...

yearning

began growing in the pit of her stomach. She could tell that something was different about her now, and she didn't like it.

"Derek, you prick, what did you do?!"

"I have no idea what you're talking about, and I'm tired of you calling me names all the time! I don't deserve it, and I think it's time you treated me a bit better!"

She could tell that he was lying, but that didn't seem to matter as her curious mind began greedily latching on to his words. Somehow, knowing that Derek wanted her to treat him better made the thought of doing so seem almost irresistibly appealing. Michelle found herself thinking of all the ways she could treat him better, from simple kindnesses like complimenting his (admittedly decent) ideas, to doing nice things for him around the office like bringing him coffee, and even a few

sexual

ideas that she normally would have found demeaning and repulsive, such as wearing more revealing clothing in case Derek enjoyed looking at her body. An image of asking Derek if she could go down on him briefly flashed through her mind and she recoiled in horror.

Michelle quickly realized what was being done to her, of course, even as her desire to be nicer to Derek began to feel more and more natural. Somehow whatever he had put in her soft drink was making her obey his commands... no, that wasn't quite it. A new, completely unexpected curiosity began to grow inside her, one that cast her mental image of herself on her knees in front of Derek in a new light.

She tried to resist the new question growing inside her, but her willpower inevitably crumbled before the power of the Juice.

"Derek, um, I, uh, I don't want to do this, but I really need to ask you what you like in women."

Derek had watched in silence as Michelle fought internally with herself, and now that she'd finally asked the question, just as the ad had said she would, he could hardly believe it. Maybe there

was

something to this stuff!

"You want to know what my Perfect Girlfriend is like, don't you?"

Michelle knew she shouldn't want to, that it was against everything she'd worked so hard for, but the Juice had left her full of nothing but curiosity and a growing, powerful sensation of... unrealized potential. She needed to change, and she needed Derek to show her how.

"Yes, please." The uncharacteristically polite answer had slipped out automatically now that being nice to Derek had fully ingrained itself in her personality.

Derek, however, wanted nothing to do with politeness after the months of torment she'd put him through. Even so, he was just as surprised by the vehemence of his answer as she was.

"Ok then, slut, my Perfect Girlfriend is you fucking my cock bareback, facedown across this desk, taking my load right in that slutty pussy of yours, and then leaving me the fuck alone!"

Michelle's head snapped back in shock and acceptance, and she immediately felt her body heating up, preparing itself for unprotected sexual intercourse with Derek. Everything made perfect sense. As she had long suspected, he was nothing but a horndog misogynist, just like every other man, and so of course all he wanted in a girlfriend was a slutty pussy to fill with cum. She'd been right about him all along.

Unfortunately, with the Perfect Girlfriend Juice pulsing insistently in her veins, Michelle's gloating was cut short as all of a sudden that repulsive, demeaning idea didn't seem quite so bad. In fact, as much as she hated to admit it, the thought of being used for meaningless sex and then discarded was starting to seem kinda hot, and as her body continued to warm with arousal she found herself silently urging her pussy to become as slutty as possible in spite of herself.

Her pussy was more than happy to oblige, and seconds later Michelle happily noted that the idea of having Derek's cock - hell,

any

cock - in her pussy was sounding better and better. She quickly reached the stage where her arousal began to tingle, signaling that her vagina had begun to lubricate, getting her reproductive tract all slick and ready for sexual intercourse.

God

Michelle needed a cock in her pussy! And, since Derek had specified that he wanted her pussy to be slutty, she knew that any cock would do as long as she could ride it bareback until it filled her up with a nice, thick load of cum.

But, Derek had also said that he wanted her fucking

his

cock, facedown across the desk, and so that's what she found herself craving more than anything.

Derek watched with a mixture of horror and curiosity as his tormentor morphed into a cock-hungry slut right before his eyes.

The transformation was subtle, but its results were unmistakable; Michelle's eyes went from narrowed with impotent outrage to wide open with helpless lust, her lips from tightly pursed to open and panting at the thought of having his cock, any cock, pounding her slutty pussy. Derek just stood there as his coworker turned around and bent over the desk, sliding her pants and underwear down far enough to give him access to her slick entrance, spreading her legs as wide as her pants would allow to make sliding into her as enticing as possible.

Derek was surprised to find himself growing hard as a rock as Michelle's glistening, now-slutty pussy came into view, clearly ready for penetration and practically begging to take his cock. As appalled as he was at his involuntary physical reaction, he still found himself unfastening his pants, pulling his cock out, and lining it up with the magnetic gap between his coworker's thin thighs.

Michelle moaned in undisguised need as soon as she felt the tip press against her sensitive labia. She impatiently thrust her ass backwards against his hips, and Derek found his cock slipping effortlessly inside his hated coworker's pussy for the first time.

Immediately, he was surprised at the intensity of the sensation. He'd had sex plenty of times before, of course, but something about the shameless way Michelle was bent over in front of him like this, using her slick, unprotected pussy to squeeze and stroke his cock with wanton abandon just turned him on like nothing he'd ever experienced before. Bottoming out deep inside her cunt felt amazing, and Derek was shocked to realize that he probably wouldn't last long at this rate. Somehow, unthinkably, sex with Michelle was just too good.

He thrust into her again, and then again, with each subsequent stroke feeling even better than the first, and he soon settled into a satisfying rhythm as she encouraged him to use her body for his pleasure.

"Yeah slut, you love being used like this, don't you?"

Michelle did love it. Her slutty pussy was made to be used, to be indiscriminately filled up with cum whenever she had the opportunity.

She knew what all of that unprotected sex would likely lead to, of course. Constantly filling her slutty pussy with jizz made it all but inevitable that she'd eventually get knocked up, and surely Derek must know that too. And it was this thought, as her slutty pussy continued to tease his cock, trying to get him to lose control inside her, that suddenly made Derek's actions begin to make even more sense to her.

Of course; like all men, he wants to get his rocks off inside me so badly because his body is programmed to use mine to reproduce, and then he wants to get rid of me so that he doesn't have to take any responsibility for the pregnancy.

Unfortunately for Michelle, however, thanks to the Perfect Girlfriend Juice this newest realization was starting to sound appealing as well. As much as she didn't want to, she could feel herself eagerly looking forward to being discarded once he had successfully inseminated her, and she couldn't help but secretly hope that he'd knock her up in the process.

She continued to think about the implications of her realization as Derek continued to pound her slutty pussy. If Derek's actions were driven by his need to pass on his genes, then, even if he didn't realize it, being his Perfect Girlfriend meant making sure that

he

was the one who impregnated her.

It all made so much sense. Derek had made her pussy slutty so that she would let him cum inside her, because that way he could impregnate her and pass on his genes. Of course, making her pussy slutty the way that he had also meant that she was now more than eager to let anyone else impregnate her as well, which would unintentionally

decrease

the chances that he'd be the one to actually fertilize her egg. So, in order to

truly

be Derek's Perfect Girlfriend, it unfortunately was starting to look like Michelle needed to make sure that she was good and knocked up with Derek's child before she could indulge her new desire to go out and fill her slutty pussy with as much jizz from as many different men as she could.

She sighed in disappointment - it was going to be agony to hold herself back like that with how slutty Derek had made her pussy, but Perfect Girlfriend Juice's power over her was absolute, and she knew that she'd have no choice but to forego all of the cocks and cum that she now craved in the meantime.

But that was a problem for another day. Right now she had Derek's cock throbbing inside her as his pace increased, and she'd never been more satisfied in her life. Michelle had never wanted kids, but now she couldn't wait to get knocked up and then ghost her baby daddy, giving him exactly what he wanted from his Perfect Girlfriend. She increased her own pace, rolling her hips against his, sinking his sensitive cock as deeply inside her slutty pussy as she could. He wouldn't be able to resist filling her with baby juice for much longer. She couldn't wait.

Meanwhile, Derek was in heaven. His physical enjoyment had never been the goal - he'd intended to just get back at Michelle for what she'd done to him and then make her leave him alone for good - but the Juice had clearly made her crazy for his cock, and her slutty behavior, focused entirely on bringing him to orgasm, combined with the incredible sensations he was feeling inside her tight, juicy pussy, all meant that his arousal was quickly nearing mind-blowing levels of intensity.

It was by far the hottest thing he'd ever experienced.

So hot, in fact, that it was far more mental and physical stimulation than Derek could take, and he found himself instinctively pressing his hips up against Michelle's flat ass as his balls prepared to empty themselves as deeply inside her canal as possible.

"Fuck yeah, here it comes slut!"

Michelle moaned in anticipation. This was exactly what she needed - Derek's load right in her slutty pussy, just as he'd said. She slammed her ass back against his hips, trying to get him to lose control, and was finally rewarded with a low grunt, followed by a rhythmic flexing of his cock against her inner walls as jets of thick liquid warmth began spreading deep inside her womb.

Derek's knees wobbled as Michelle continued rolling her hips against his, sliding his sensitive frenulum against the slick front wall of her vagina again and again, triggering a new spurt of semen each time. She was milking him, forcing every last contraction of his balls that she could, filling her slutty pussy with as much of his cum as she could possibly take, and when she finally stopped, Derek was left with a deep, primal feeling of satisfying emptiness.

As soon as Michelle sensed that Derek was done, however, and that she couldn't squeeze any more jizz out of his rapidly shrinking cock, she silently pulled herself off him, slid her pants back up over her hips - hiding her slutty pussy away from his view in the process, now that it was nice and full of his cum - and disappeared out the door of the office without a word or a backward glance.

Derek was still standing motionless as the aftershocks of the most intense pleasure he'd ever felt coursed through his body, and a final cloudy drop of his cum dripped from the tip of his flaccid penis onto the floor of the office.

Once he finally came to himself and realized that Michelle had already left, the insanity of what he'd just done and experienced finally began to sink in. Even so, he marveled at how good it had all felt, especially the sensation of filling Michelle up at the end of it all.

Still, he couldn't imagine what the fallout of all this would be. Would she report him and get him fired? Or would she actually leave him alone now so that he could work in peace?

Either way, he realized with a sigh, she'd left him to clean up and then finish all of the work himself.

Just like he'd told her to.

Part 2

Once Michelle had left the office, she found herself wondering what she was supposed to do next.

She couldn't help but be proud of how perfectly she'd fulfilled her duties as Derek's Perfect Girlfriend. She'd let her pussy get all slutty for him (and everyone else), had let him cum inside her facedown on the desk just like he'd wanted to, and then had immediately left him the fuck alone, but now she wasn't really sure where to go from there.

She wanted to know more about Derek's Perfect Girlrfriend, of course, thanks to the Juice, but his demand that she leave him the fuck alone took precedence, and so that desire too would go unfulfilled.

Obviously she'd continue to stay away from him, but other than her slutty pussy's new need for cock, which was constant and all-consuming, he hadn't really given her much direction about what else he wanted her to do.

Still, based on what she'd already found out - and subsequently inferred - about what Derek wanted, she could at least make a few educated guesses. Since he subconsciously wanted to impregnate her, Michelle needed to make sure that she was pregnant before giving in to her constant need to fill her slutty pussy with giant loads of cum. Also, since he subconsciously wanted to pass on his genes to the next generation, she could also assume that he'd want her to maintain a reasonably healthy lifestyle, keep going to work, etc., but other than that she was completely at a loss.

So, Michelle just went home, played with her slutty pussy in a futile attempt to take the edge off its need, and daydreamed about how good it would feel to have a nice, thick cock depositing another load of baby batter deep inside her.

At first, Derek was pleasantly surprised when he didn't see Michelle a single time over the course of the next week, even though they worked on the same floor. She'd apparently taken his request that she leave him alone to heart, and even seemed to be actively avoiding him.

Their boss soon noticed the lack of friction in the office as well, and congratulated Derek on his success in smoothing out their relationship. Derek knew that he should be ecstatic that things had worked out as well as they had, especially since his promotion was practically guaranteed now that he was free of Michelle's interference, and he had to admit that it was a genuine relief to not have to deal with her constant attacks, and yet...

For some reason he couldn't get her out of his mind.

He didn't know if it was guilt over what he had done to her, or worry that she'd report him to HR after all, or something to do with the sex they'd had (which had admittedly been the best in his life), but Derek found himself, well,

missing

her wasn't quite the word, but he was at least acutely aware of her absence.

All of this internal turmoil ultimately led to him self-consciously making his way over to Michelle's office to check on her.

As soon as Michelle saw him framed in the doorway of her office, her eyes began to dart back and forth in panic, clearly scrambling to escape so that she could leave him the fuck alone, but once she realized that he had her cornered, and therefore must have

wanted

to see her for some reason, she immediately composed herself in her chair into a picture of cool, professional politeness.