Janise's fingers danced across the computer keyboard as she entered the details for the upcoming experiment: participants, date and time, and the supervisor – her wife, Aylissa, RIXANA's Head of Research and Testing. Janise's long orange hair hung down to her waist over her lab coat, which was the only thing she was wearing, a not uncommon occurrence while on the facility's grounds. Her breasts held the coat open, her inverted nipples and the rectangular ring piercings plainly visible, and in the space between her thighs hung a currently flaccid white cock with a pink glans.

The white wolf knew the routine well, since she herself was the Head of Manpower and Logistics. Her nine tails were the result of a series of body modifications, and her male assets were another; born female, one of RIXANA's experiments had made her a hermaphrodite. Given the kinds of research the facility did, volunteering for experiments was a fun way to climb the ranks...

With a final strike of the enter key, Janise leaned back and spun around in her swivel chair. Aylissa was waiting for her at the side counter of the examination room with all of the necessary equipment laid out on top of it. A red fox with six tails compared to Janise's nine, dark 'sock' patterns of fur on her arms and legs, and standing much shorter than Janise as well, Aylissa's clothes were piled up on a chair nearby, leaving her naked. At a glance she was much like Janise, with both breasts and a cock visible from the front, but anyone looking at her from behind – as Janise was doing while getting up from her chair – would have noticed she lacked a vagina. Perhaps one day RIXANA's experiments would fix that, but that wasn't part of today's routine. The closest they had come was the urethral reroute surgery that resulted in two openings in Aylissa's perineum – currently connected with a small plastic tube.

"All ready?" Janise asked, stripping off her lab coat and leaving it behind before pressing up to Aylissa's back, sliding her hands along the fox's body.

Aylissa turned her head and looked back over her shoulder at Janise, sticking her hips out behind her a little more and raising her tails higher. "I've been ready for the last five minutes," she replied with a smirk.

"It's easier to get the paperwork done -before- we get lube everywhere," Janise teased. "Speaking of which..."

Aylissa obligingly took one of the glass jars in front of her and held it back for Janise to grab. It was filled with a clear fluid and would have been quite nondescript if not for the labels on the side: an ominous plastic 'SAMPLE #0A74261' label placed directly above a paper label with a note in Aylissa's writing that read 'Capacity lubricant batch #4'.

Janise took the jar and Aylissa bent back over the counter again, lifting her tails out of the way, spreading her legs for good measure. "Get it in there nice and deep," Aylissa told Janise.

Snorting in amusement, Janise opened the lid and scooped out a generous amount of the fluid. When they'd tested out batch #3, Aylissa had fit her entire leg into Janise's ass with ease, so a much greater test was in order...

Aylissa shivered when she felt the cold lubricant against her sphincter as Janise worked her hand inside, starting with just a finger, then two, then four. Normally she'd have to work up to an insertion of that size, but the lubricant made her far stretchier than normal. How stretchy? That was what the experiment was supposed to find out. Aylissa groaned and pushed her hips back as Janise wedged her whole hand inside, then pulled it back out with a pop to apply more lubricant before pushing her fist back in.

"It's cold...!" Aylissa groaned out, though even that didn't stop her from getting aroused, her cock stiffening up between her legs as Janise's whole hand sank into her.

"Fresh from the same fridge where we keep all the stethoscopes," Janise joked. Her own arousal was growing as she teased her wife, but she ignored it to focus on the task at hand. Though admittedly there would be a much more expedient way to move things forward... "Ass up, please," she instructed while withdrawing her hand once again.

Aylissa moved away from the counter to bend at the waist and reach down, her tails held high. Janise's fingers entered her once more, but this time the wolf spread them out and stretched Aylissa's sphincter wide to reveal the tunnel beyond, and then simply poured the remaining lubricant in the bottle into Aylissa's stretched ass. The fox moaned out from the sudden feeling of the fluid flowing into her, and even more when Janise pushed her arm in much deeper than before, able to wedge it in all the way up to her shoulder with the aid of the lubricant vastly improving Aylissa's ability to stretch.

But as they had learned last time, a limb wasn't enough for a proper test. Pulling her arm out – and making Aylissa moan once more – Janise exchanged the empty lube bottle for a container with two blue, semitransparent balls in it, opening it with her dry hand to pluck one out. They were made of a special gel, another product of RIXANA's research, which would expand over time by absorbing moisture. The perfect way to truly test their capacities under the effects of the lubricant...

The ball of gel was moderately firm, not unlike a stress toy. She pressed it up against Aylissa's lube-covered anus and pushed it in with ease, though it still made her partner shiver and gasp out. Giving her a pat on the rump with her dry hand, Janise declared, "All done!" and made her way to the sink to clean off her arm.

Aylissa stood back up, panting and doing her best to ignore her throbbing cock as she reached out for one last bit of gear: one of the two chastity belts on the counter, made of a large plug and a heavy strap with a lock at the front, both of which had their keys in the locks. Lining the plug up with her ass, Aylissa backed up to the wall, bracing the base of the plug against it before pushing her hips further back. Another heavy moan escaped her as the plug popped into her easily, sealing that hole thoroughly, and at the same time pushing her over the edge, making her shudder and shoot cum across the floor tiles in front of her.

Janise smirked and returned her attention to the sink, but midway through cleaning her arm she felt Aylissa's arm pushing her tails upwards. "You're part of his experiment too, don't forget," Aylissa reminded her, and Janise felt Aylissa's lubricant-covered fingers pressing up against her sphincter, coaxing it open.

"I didn't forget," Janise gasped out before moaning as Aylissa's fingers penetrated, one after another, her thumb joining in a moment later. Aylissa sank her whole hand in, then pulled the palm back out, pouring more lubricant onto her hand before pushing it back inside, twisting her wrist to thoroughly smear lubricant on Janise's inner walls. In and out she repeated the motion, reaching deeper and adding more lube each time, reducing Janise to a moaning mess as she clung to the edge of the sink, the water still running as she forgot about everything else for the moment.

As she got in deeper, Aylissa poured the lube across her arm in addition to on her hand, fisting deeper and deeper into her wife until she had used up all of the lubricant. Pulling her hand out entirely once more, making Janise groan and shudder, she grabbed the last gel ball and shoved it in deeply, wriggling and twisting her arm within Janise's tunnels to tease her as much as she could.

And to great effect: Janise's cock splattered cum across the doors of the sink cabinet she was slumped over, her moans filling the room. Aylissa continued teasing her until Janise's orgasm had ended, and then pulled her arm back out, leaving Janise panting in recovery for the few seconds it took to retrieve the second belt.

Janise groaned out again when Aylissa pushed the plug into her, all nine of her tails flicking upwards once more in response. As soon as it was buried within Janise's rump, Aylissa reached around to secure the belt, feeding the buckle into the lock and then turning the key to lock it, taking the tiny steel key out a moment later. "I'll be holding onto this," Aylissa asserted.

Regaining her senses a little, Janise partly rose and turned to her wife: Aylissa had closed but not locked her belt, so Janise reached out, turned the key until she heard a click, and then turned it back to withdraw it. "Don't lose it," she said as she straightened up, feeling the girth of the plug inside of her ass. She was taking it incredibly well, a sign the lube was doing its job.

"Don't you have a meeting in five minutes?" Aylissa reminded her playfully.

Janise glanced at the wall clock. "Oh, you're right!" she exclaimed, hurriedly toweling off her arm. "I'll leave you to clean up in here, and we can meet back up for the results later."

She tossed the towel onto the counter and grabbed her lab coat, donning it quickly and leaving it open as she left the room, her breasts bouncing and her cock swaying as she ran. Aylissa chuckled and reached for the towel to clean up the cum on the floor and cabinets, her tails all swishing in unison.

--------------------

Janise stumbled through the door to the testing chamber, thrown off by the immense weight in her belly. Her coworkers had been indifferent or sometimes amused as she had attended her meetings and conducted experiments as normal despite the gradually growing bulge in her gut; such things were commonplace in RIXANA. Aylissa's day had been quite similar as far as Janise had gathered from the times they had bumped into each other – literally in one case – and the frequent lewd selfies they had been sending back and forth. Janise would be spending a lot of time looking over them later, that was for certain.

But as the gel had grown further and further, it had truly begun to test the limits of what the lubricant could provide. Her guts were completely full of it, and she was so swollen as to look pregnant, even though the fullness was most certainly not in her female side. Towards the end of the day it had become more of a problem as she had felt the urge to push it out, but the plug was doing its job; every involuntary strain of her insides against their burden was fruitless, only increasing the pressure within. Her last meeting had had her dancing around constantly, feeling like she had to take the world's largest dump; yet despite the discomfort and urgency it was an incredibly arousing sensation, as her throbbing cock and leaking wet pussylips could attest to.

Aylissa was not in the testing chamber, and Janise groaned. She knew she was almost at her limit, and Aylissa had agreed when Janise had sent a text asking her to meet up to conclude the experiment. It was necessary for them to meet in the testing chamber, considering the mess they were going to make: without any equipment set up in advance the room was simply a big, empty tiled space with a drain in the center. Staggering over to the wall, Janise leaned against it, shuddering heavily as her body tried in vain once again to void her packed bowels of the gel filling them, straining against the plug fruitlessly.

Janise felt over her belly with both hands once that urge subsided. It had a little bit of give to it but the gel was still somewhat firm even as it expanded. Just how much was she holding?

The doors opened, and Aylissa staggered forward, holding onto the door frame. The red fox's belly was just as immensely bloated as Janise's, yet her shorter frame gave her more trouble with it, and she was struggling to walk, her cock pulsing and leaking precum onto the floor. She was a panting, leaking mess, wearing only a lab coat much like Janise; Aylissa had already sent a video earlier of her stripping when her belly was below half its current size, to 'make room' as she had put it in the accompanying text message.

"Heeeey, hon," Janise greeted her, trying to wave with one hand but soon shuddering from another clench of her guts.

"Fuck, you look hot like that," Aylissa replied bluntly, keeping one hand on the wall to stay upright as she staggered, her huge belly wobbling as she walked. "Have you cum since we started?"

"No, I was saving it for you," Janise replied, straightening up, bracing herself on the wall.

"Me too," Aylissa murmured. As soon as she reached her wife she embraced the wolf, who returned the gesture, as much as she could with their bellies in the way, pressing against each other. It only increased the pressure in their guts, but their amorousness won out, both of them kissing each other passionately and maneuvering to attempt to grind to one another. It was difficult, but eventually their cocks found each other and slid together, copiously leaking from their tips.

More contractions hit them and they both shuddered in the embrace of the other, disregarding the pressure and discomfort to continue their intimate moment, tongues dancing and cocks frotting. The next contraction, however, they couldn't simply ignore: Aylissa pulled away and put a hand over her belly, panting for breath. "Oh, I feel so full...!" she groaned out, her legs trembling as the gel strained at the plug in her ass, pushing so hard that the belt began digging into her hips. Her hands fumbled with the lab coat pockets as she searched for the key. "It's gotten so much stronger in the last few minutes, the lube must be wearing off..."

Janise would have replied if not for her own contraction, making her legs weak. "It must be..." she groaned in agreement. The pressure eased within her suddenly only for the fullness to spread: it was expanding into her stomach, and that was just about her limit. She tugged the key to Aylissa's belt out from an inner pocket in her lab coat, reaching out and scraping it against the lock, getting it into the hole on the third try. Aylissa, meanwhile, retrieved the key to Janise's chastity belt from her own coat, only to drop it onto the floor when she was hit by another sudden contraction, moaning out loudly.

Aylissa got down on her knees, trembling from head to toe, grabbing the dropped key and holding it up towards Janise's belt. She fumbled with it in a race against time: Aylissa held one hand against her mouth as she felt the gel starting to come up, but she kept it down and jammed the key into Janise's lock with her other hand, turning it and then leaning back.

Janise managed to open hers first, and the moment the lock was undone the pressure won out and forced the plug from her ass. The whole belt clattered to the floor, and she leaned on the wall in a half-squat with her tails up as the now pale blue gel slid out from her ass rapidly. The firm, smooth substance was shoved out by her anal muscles, and the sensation of it leaving her was enough to push her over the edge, her cock shooting cum across Aylissa's front as lengths of the blue gel landed on the floor under Janise's ass and began to pile up there.

Aylissa wasn't far behind, opening her lock and having the pressure overcome the resistance of her sphincter immediately. Her tails raised up as her bowels voided violently, longer but narrower quantities of gel than Janise's surging out from her ass and piling up on the tiles behind her. The lengths of gel rubbed against her prostate on the way out and drove her to a climax of her own, her cock shooting its load onto the floor between Janise's feet.

As the gel continued to surge out from her, Janise knelt down with her wife and embraced her again, holding her and trembling, feeling Aylissa take hold of her in return. They were both still so full, and their distended bellies so large, but now that they were finally relieving the pressure within they were able to hug each other tightly and pant for breath. Great quantities of the gel were shoved from their asses, some of it in smaller pieces yet most in much greater lengths that slithered out of their holes to join the rest of the mess behind them. The lubricant wearing off made their insides contract all the more rapidly, causing occasional sudden surges of the gel to erupt from them with more force, and more pleasure to both of them as a result.

Slowly, gradually, their bellies shrank as the messes behind them grew, the two embracing and kissing once more. Janise came once again and painted Aylissa's diminishing swelling with more of her jizz, and Aylissa held out only a bit longer before returning the favor, clutching to Janise's body as she trembled from another orgasm brought on by the intensity of the experience. Time lost meaning to both of them as they both were consumed by the overwhelming sensation of relief, at some point collapsing onto their sides, still in each other's arms and still emptying themselves onto the tiled floor...

The ending of it was more of a shock to Janise than the beginning, suddenly aware of just how empty she felt. Opening her eyes a tiny bit, she looked back at the enormous pile of gel behind her, and then at the similar one behind Aylissa. Panting heavily, she pulled the fox close to her, breasts pressing together, their cum-covered bellies soon touching.

"That was..." Aylissa murmured between breaths, rubbing at Janise's back.

"Indulgent?" Janise teased quietly, her chest heaving as well as she recovered.

"Science," Aylissa joked. "The difference comes... from writing it down... and recording the results. And I should... do that."

Aylissa began to rise, trying to get up, only for Janise to pull her back down insistently and kiss her on the cheek. "We have video feeds," she reminded Aylissa, squeezing her wife closely. "We can watch the recordings... later."

Aylissa conceded the point by cuddling Janise back just as tightly, resting her head against the side of Janise's to enjoy the rest of their afterglow together.
