The Breakthrough

"That's the last one," you said, trying to keep your voice level and remain professional. After putting the pen down onto the small round table your aunt had in the living room you gave your wrist a shake to get feeling back into your fingers. Your colleague reached over and picked up the final page to check your signature and nodded. She placed it onto the thick stack of forms and waivers next to her that you had spent the last hour reading, signing and putting your initials to. Despite her eagerness in helping you there was a slight furrow in her otherwise very delicate brow. She pouted her glossy pink lips adorably, tapping the end of pencil against her cute button nose. Brynn was the colleague who called you last night and she sat across the table looking her radiant best as always. Well, as radiant as a woman who had rushed to your aunt's house as soon as she woke up and pulled her dark, wiry hair in a frantic bun could look. Her makeup was minimal, which made how perfect her complexion was all the more impressive. The light bit of violet eyeshadow around her emerald eyes was the only thing a guy like you could really notice as not 'natural'.

"And you're really okay with the side effects?" she asked you, that jewel-like gaze making you forget yourself for a moment. You shrugged.

"It's a long list but I'm hoping it won't be too bad," you admitted. Brynn nodded, now nibbling at the end of her pencil as she checked the papers again.

"Yeah we kind of had to guess at a few of these side effects," she said. "With how accelerated the program became we just wanted to cover more bases. Okay!" With that your sometimes lab partner clapped her hands together, any concern she might have had on her face dissolving immediately. "We should get started."

"Tea?" asked your aunt as she sauntered over to the table with a small silver tray where two stylish cups of Japanese green tea steamed invitingly. The offer was mainly made to your attractive colleague and you could see a glimmer in your aunt's eye. Brynn nodded appreciatively as she took the cup.

"Thank you, Miss Leslie," she said politely, her sweet bobbing bow making both you and your aunt bite your lips.

"You can just call me Leslie, sugar," Aunt Les told her with a wink. "Or just Les, like this one does." She mussed up your hair, making you wince, but everything felt quite a bit better hearing Brynn's fluttery giggle. "So what's all this then?" Leslie asked, making an inquisitive face at all the paperwork on the desk, as if you hadn't already explained it all to her last night.

"Oh uh..." began Brynn nervously, not wanting things to be awkward between you and your aunt. You waved away her concern dismissively.

"My aunt knows about my job," you told her, much to Brynn's relief.

"And I hear he's very good at," added Leslie, playing the role of inappropriately cheeky aunt quite well. Brynn's expression was devoid of any suspicion of just how inappropriate of an aunt Leslie had become.

"Oh, well these are just some things to sign before we administer the new, experimental **** to John here," explained the sexy scientist. You kind of wished she had worn her lab coat to come visit you but were happy to settle for this low cut red blouse and white skirt combo she had just thrown on without too much thought. She cut quite a figure in it, the petite but busty girl habitually tugging at her shirt to minimize her slipping cleavage while simultaneously accentuating it each time she did. You could tell your aunt was appreciating it too, and couldn't help but think your colleague didn't mind her leery attention overmuch. You realised you never considered what Brynn's sexual preferences were. You had been working with her for the last six months but there was a tendency for peole to bounce around labs so you really only directly interacted with the girl a handful of times. You never got to learn much about her personal life but thanks to mobile technology making quick communication easy and ubiquitous you and Brynn were very familiar with each other in your working relationship.

Your aunt pulled up a chair to the cramped table, her bare knees touching yours and one obviously 'accidentally' rubbing up against Brynn's. She looked immensely interested in your colleague's clinical explanations of what this new **** was meant to do, how it affected the male reproductive system, which in a few minutes would be your particular reproductive system. "And then the volume of semen the subject can produce in each load should triple, perhaps even quadruple in some cases!" finished your colleague excitedly. Your aunt had a big smile on her face, infected by Brynn's enthusiasm but also from thinking about how much cum she would soon be able to get from you, if things went well.

"That should really help sufferers of the addiction then," said your aunt, still not wanting anybody but you to know that she was one of the addicted. "Short of a cure anyway." Your colleague nodded at this.

"The number of cases is always increasing, and while donors aren't exactly in short supply now, things could change very rapidly," Brynn said, looking serious. "We need to be prepared. If this trial goes well we could start mass production of the ****... Oh I don't know, within the year maybe?" She looked over to you, her stare a little... possessive. It was no secret that you were one of the better donor specimens around, not to mention how good of a researcher you were. You were also, it seems, born for this. One had to have very particular genetics for this treatment to work, so that added to the importance of this experiment being successful... and would not adversely affect your ability to produce your precious semen.

Brynn picked up her own heavy case of equipment and opened it on the table. She pulled out a vial containing a rather large purple pill inside. She handed it to you while she prepared the other part of the treatment behind the open lid of her case. "Take that, and then in about five minutes we'll administer the injection," she said. You nodded, scrutinizing the pill between your fingers before popping it into your mouth. You noticed the hungry look in your aunt staring at you as you washed it down with a sip of tea.

"How do you feel?" your aunt asked you almost immediately.

"He won't feel anything for a little while yet, Les," said Brynn with a smile. "We still need to do the injection...uhm... is there somewhere a little more private we could... work?" Brynn looked to you and you remembered where this next injection needed to be made from reading the prepared documents.

"Oh I can leave the room," said your aunt helpfully, briskly standing. "Take all the time you need."

"It's just a quick jab," Brynn explained, snapping on a pair of surgical gloves. "Should only take a second." At this your aunt nodded, winked at you, then went to give the scientists their privacy by powdering her nose in the bathroom or something. You stood too, unbuckling your belt with casualness. "Your aunt is pretty cool," Brynn said, picking up the injection device which was thankfully closer to an insulin or epinephrine injector rather than some horrific long-needled syringe.

"She's alright," you said, smirking to yourself. "She's been really great about me uh... staying here. Since my actual patient is not comfortable with my living with them yet." It was a simple but believable lie, since a more prudish cum addict was rare but not unheard of. Especially if they had been diagnosed early and their condition wasn't too advanced yet. You stepped next to your colleague and opened your fly, pulling down your underwear and exposing your already semi-hard cock to her. Brynn's nonreaction was expected, though she did raise an eyebrow when she saw that you were starting to swell a little bit. "Getting a bit excited are we?" she smiled as she took your cock with a gloved hand, the cool rubbery material of it making you shiver, the warmth from her skin that permeated through the it making you groan involuntarily. "Oops, sorry," she said, feeling your erection stiffen in her hand but not at all embarrassed, offended or particularly flattered. She was in fact quite used it now, having worked with you in a similar fashion before under laboratory conditions. She never sucked your dick or jerked you off of course, no, but she did need to examine your genitals a couple of times in the past. She had handled quite a few more sets of other men's genitals before that and after, so her acceptance of your immediate arousal as just a natural biological function of your body to stimulus was just how her scientific mind worked.

You weren't sure if Brynn was oblivious to how sexually stimulating she was though, or if she was fully aware of the fact but loved the science too much to care. She was such a sweet girl... you felt bad about hoping she would develop the addiction herself one day... At least she wouldn't be squeamish about her treatments. She continued prodding and squeezing your testicles in the most pleasant fashion as she searched for the right spot for the injection, your cock now at full mast, your fists clenched. "When's your next load scheduled?" Brynn asked, noticing how full you already were.

"A couple of hours," you said, though not really sure yourself. Your aunt, after hearing about what was to happen this morning had opted to wait until after the treatment to get her first load of the day. You told her that it was probably not a good idea, but she insisted. She spent most of the morning masturbating in her bedroom before Brynn got in, trying to stifle her urges and symptoms via sexual release, but that would only last her for so long. You sighed, feeling Brynn's hand slide up your shaft, then she started to gently stroke you at the tip.

"Whoa! What are you doing?" you said with a start, staring at her as she continued to frown at your cock, her other hand still examining your scrotum.

"Hmm? Oh sorry," she said, stopping her **** jerking you off but now holding the head of your cock in the palm of her glove. "I find this makes certain parts of the male anatomy easier to examine... the spot for the injection is pretty specific," she was poking you quite firmly below the base of your erection now, pushing her finger between the space where your penis met your testicles. "There... yep. That's where we need to go," she said finally. You sucked in a breath feeling the cold plastic head of the injection pen push against your skin. "You'll feel just the teensiest prick," she said, two seconds before pressing the button. A tiny pin shot into your flesh and and you winced just reacting to the pressure rather than due to any real pain. The injection device took a few seconds to completely deliver its serum dosage and then it beeped. Brynne pulled it away, rubbed a quick disinfectant swab in the area, squinted at the almost imperceptible pinhole puncture, then finally let go of your iron member. "All done," she said, pulling off the gloves and disposing of them into a silver biohazard canister along with the injector. You looked down at your erection, not feeling any different, or even any lingering soreness, and was relieved.

Brynn began to pack away all of her things and you stuffed your cock back into your pants despite the mild discomfort hiding your erection would cause. "It should start working in about an hour, so try not to jerk off before then," she said, obviously comfortable with the less scientific terms since this was everyday business for her. She stood, the clasps snapping as she shut her case. "And I've got to get going."

"Aw leaving so soon?" said your aunt, walking back into the living room with suspiciously good timing. Brynn didn't seem to notice that and just smiled warmly.

"Yeah I've got a lot of filing to do for this, and then prepping for the next dosage," she explained.

"How many doses will I need again?" you asked her, starting to feel a low simmering sensation right at the bottom of your balls... which wasn't unpleasant but was definitely unusual.

"That's going to depend on how your body reacts," Brynn replied. "But I think at least two more." At that you nodded, strangely looking forward to your next examination even if each time would end in a case of blueballs. Glancing at your aunt you knew an actual release was never too far away though. "So I'll come back tomorrow and uh... we'll see then," she said, as your aunt saw her out.

Leslie waved after your departing colleague fondly then when her swinging hips were finally out of sight your aunt pressed her back against the fastly shut apartment door. She looked at you with a predatory expression.

"We... shouldn't do anything for another hour at least," you told her, somehow remaining professional in the face of such seductive adversity. Your aunt's face fell slightly but she was mature enough to listen to your expert opinion. She strolled purposefully to the kitchen instead, turned on the oven timer, then proceeded to stare at it ticking down from the 60 minute mark.