"I'd like a demonstration," blurts out Jim. Sharon gives him an annoyed stare. "What?"
"Certainly," replies Dr. Wu.
A pedestal rises up from the center of the room revealing a multitude of artificial phalli of a wide variety of shapes and sizes. From the fairly small and with modest shapes; to those of average size and normal shapes; all the way to those which either appeared to be lifecasts of farm animals or some manner of sizeable fantasy creature.
"We've pushed the limit of our research in order to offer our clients a broader variety of choice when it comes to what modifications and how much of a modification can be made to their bodies," starts Dr. Wu. He continues, "The wide variety of shapes and sizes of devices here are often used in active development of the modifications with Julie being our test bed once they're sufficiently developed enough to be integrated into her."
Dr. Wu picks up a vibrator that looks like a chunky pen with a cartoon cat sitting at the top of it and casually hands it to his daughter.
"This was one of my first toys that I got before daddy started making modifications to me," states Julie, "It's pretty low-powered, but it still feels good."
Julie takes the tiny vibrator and gives it a small twist to turn it on. It hums very quietly. She bends over and rests her forearm across the top of the pedestal to support her torso. As she does so her moderately sized hips and low, sloping rear are put on display to both Jim and Sharon; the small well-shaped cheeks of her rear end pulling slightly up and away as her crotch pivots towards them. Julile reaches back; and takes the vibrator and gently presses it against the area near her anus and softly gasps. "Like daddy said I have a copy of some of my clit back here so this feels better than before," Julie states.
"Yes, it's a copy of just the internal structures of Julie's clitoris sitting around the entrance the way it does around her vagina," Dr. Wu chimes in. "We're working on developing the external part of the clitoris to sit in a completely innocuous looking bit of tissue either sitting between her anus and tail bone; or at the rear of the perineum,or perhaps around the entire outside area," he continues.
By this point Julie is breathing a little more rapidly and a slight sheen of wetness has formed at the edge of Julie's anus. She reaches forwards again, twists the vibrator off and sets it onto the pedestal in front of her. "Since I have a kitty in the back now I get wet back here too," states Julie, "It makes playing in the back easier and feel soooo much better."
"As you can see we've also engineered her rear vagina to get wet faster to allow for more immediate intercourse," announces Dr. Wu, "she becomes wet enough for most activities within seconds of being stimulated and wet enough for larger objects after about a minute."
Julie hovers her hand above a few different toys; an egg rotor, a simple dildo, a larger dildo approaching a size that might justify a larger condom had it been attached to a person. "Daddy, should I cover the basics or speed up the demonstration?" asks Jullie.
"Go ahead and do what you think might impress our guests," replies Dr. Wu.
Julie smiles with a slightly mischievous grin.
She turns towards Jim and looks at his crotch, turns back around, grabs a vibrator, and switches it on. She reaches back, vibrator in hand, and holds it behind her for a moment. Jim takes notice that it's a flesh-toned, silicone vibrator roughly the same length and girth as his own parts. She rests the tip of it between her cheeks and pushes it in. As it rapidly sinks into her Julie lets out a gasp. She buries it all the way down to the flared base, waits a moment, and quickly pulls it almost all the way back out. For a brief moment it glistens with her wetness in the lighting of the lab. Suddenly she rams it all the way back into her rear. She lets go of the base and with her index finger gently pushes on the end of it. The flared base sink into her, her anus fully closing around it. "That's…good," she moans.
"As you can see she can easily take a average-sized parts with absolutely no problem, yet as you can see she still feels quite a bit of pleasure from it," says Dr. Wu.
Jim notices Julie turn back to look at him straight in the eyes. Her face slightly flushed red, eyes heavy-lidded as the vibrator continues to do its job. She reaches back and daintily inserts her index and thumb all the way into her rear. She straightens up a bit for a few seconds and slowly takes a few breaths; then she leans back over and wiggles around her hand a bit. He sees her middle finger slip into her and her hand begins to move more slowly. She pulls the vibrator out, switches it off, and sets it back down on the pedestal. She rests for a few moments with a slightly hazy, dreamy look on her face before moving on to the next part of the demonstration.
Jullie reaches over and grabs the end of what looks like a blue-green colored, large amount of, coiled-up garden hose, but what Jim and Sharon can only assume to be another sex toy. She holds up the end of it; it's smooth and highly flexible; and has a tapered tip that looks somewhat like an abstract cock head with a more streamlined appearance. The shaft of it seems to have a repeating pattern of thin, ring-shaped markings of slightly different thicknesses on it, as well as numbers. it She takes the tip, places it between her butt cheeks, gently pushes it into her rear.
"Hhhhhhh," Julie gasps.
"Julie will take as much of this flexible dildo into her as she can," announces Dr. Wu.
Dr. Wu nods at his daughter who nods back.
She reaches back again and begins to steadily feed the dildo into her modified rear. As the dildo steadily disappears Jim estimates that each loop of dildo is about 4' in length. After a few minutes several loops have slipped into Julie with no sign of it becoming more difficult. The only indicator of anything being different the red blush on Julie's face and her slightly quickened breaths.
Jim whispers to Sharon, "Where is it all going?" Sharon shrugs in response.
A few more minutes pass and at least 8 loops have disappeared into Julie. "Let's speed things up shall we?" chimes in Dr. Wu.
Julie turns her head sideways and rests her shoulders on the pedestal. She reaches back with both hands and starts to feed the flexible shaft into herself, hand over hand. A lustful look spreads across her face as her shoulders and hips move side-to-side in unison. The sway of her hips almost an exaggerated roll as if she were climbing particularly tall steps in the most flirtatious way possible.
"Is it alright to start part of the hands on portion of the demonstartion, daddy?" Julie inquires casually.
"Let's get a few more loops in and then our guests here can come over," replies Dr. Wu.
"Okay!" she cheerfully resounds.
"As you may have wondered where all this length is going there's no trick here; it's all going inside of her," Dr. Wu announces. "It's hitting the end of the modified vagina that we've grafted into her rear, curling around, going back down, hitting the inside of the sphincter, curling around, and then going back up. It took us a while to figure this out and we had Julie do this while inside one of our imaging systems to figure out what was going on. It was nothing short of surprising and we're more than pleased with the results."
"It feels like an infinite thrust…mmmm…in and an infinite thrust…out at the…mmmMMMM…same…time," Julie says slightly short of breath.
Sharon looks on with a slightly envious look.
"How about you two come help out Julie now?" Dr. Wu chimes in.
Jim and Sharon slowly walk over and stand next to Julie. Julie cranes her neck as much as she can to look at the two.
"Jim, I want you to be the one stuffing my rear kitty!" says Julie with a smile, "and Sharon, you'll help him stuff me by pulling the dildo off the coil so that it doesn't get tangled—I usually don't mind taking knots, but I want us to go as fast as we can."
Jim takes the part of the dildo closest to Julie's rear entrance from her and Sharon the part closer to the coil. Julie gets her forearms back under her torso and lifts her shoulders off of the pedestal. She looks at her father and nods
"She ready for you to start," announces Dr. Wu.
Jim begins to push the dildo into Julie's rear entrance with surprising ease. It actually slides into her more easily than he's ever felt a dildo slide into the front of a woman let alone the rear.
"In addition to engineering the rear vagina to be longer and more responsive with its wetness we've made other adjustments to the quality of the lubrication," Dr. Wu states, "what we've done is modify a some of the cells to make what's effectively silicone lubricant." He continues, "With Julie's ability to adjust the water in her body she can also control the consistency of her lubrication; from a thin lube-like quality all the way to a highly-viscous jelly. In fact this modification works so well that we've also modified her original vagina to include this ability. The only downside is that the more often she gets wet the more silica she needs to consume. "
"Mmmm…Daddy gave me supplements…Ohhh…but I still prefer bananas," Julie adds between moans.
"Don't worry about going slowly to be gentle," Dr. Wu chimes in, "in some of our tests we've gone at a fairly high rate of speed."
Jim and Sharon pick up the pace feeding the shaft in Julie. Coils rapidly come off the pile and disappear into Julie's rear. Julie reaches one arm down to feel her abdomen with her hand.
"Mmmm…it's starting to feel nice and full!" exclaims Julie. "Faster," she says.
Both Jim and Sharon start to see her formerly flat stomach start to bulge out a bit like someone just "starting to show"—the coiled outline of the dildo just barely visble. Curious to see how far this demonstration will go Jim starts to shove the shaft into Julie at a breakneck pace.
"That's better…it's…mmmmMM…stirring my…insides," Julie says between moans.
Julie's abdomen is now starting to bulge fairly visibly as if she were 4th months of pregnant. Sharon's eyes start to bulge in disbelief.
Dr. Wu starts again, "Some while after we re-routed Julie's solids we worked on making her body more supple and durable." He continues, "In our research we hit upon various mutations that make skin impressively elastic and ligaments extremely flexible. Typically there are severe disadvantages to these so we worked on correcting them. We've selectively altered some of Julie's tissues to be responsive to these compounds while others are resistant to them. This allows her to bend and contort better than a champion gymnast and her skin would able to keep up with all of it without so much as a crease—this has an incredible anti-aging effect and, based on our tests, Julie will look the same as she does now indefinitely."
Sharon's expression changes to one of pondering.
At this point Julie's eyes are shut tightly and her expression tense. Her arm is braced against her abdomen, the bulge now making her look like she's at the "ready to burst" stage of pregnancy, but made even more noticeable by the lack of extra padding that would be afforded to someone pregnant. The circling motion of the mass inside her has now become apparent as the outline of the coils press outwards against her taut abdomen. "Keep…feeding…my…rear……kitty!" she exclaims.
Jim speeds up, his hands moving like his life depends on it; yards of coil disappearing in mere seconds. Suddenly the coil whips out of Sharon's hands, the flared tail of it flying away from her. This causes Jim to drop his section of shaft as well. The coiled mass within Julie keeps spinning, its inertia mixed with her most personal of lubricants allowing it to easily do so. The dildo sucks up into her rear like an over-sized, blue-green noodle—the end of it smacking against her butt cheeks as it gets pull up. The flared base finally runs into the outside of her anus and comes to a halt; the mass inside her shifting from the restriction.
"MmmmMMMMMMMMMMMM…ahHHHHH!!!" Julie screams in release as she opens relaxes her muslces and the flared base sucked up; drawn past the sensitive nerves installed in her rear entrance. "I took it all, Daddy," Julie says shakily.
Julie clings to the top edge of the pedestal with her fore arm, her knees slightly buckled; her legs spread apart. covered in her own juices. Her thin body is disrupted by the large coil of dildo inside of her making her appear to have a ball of rope inside of her the size of an exercise ball.
"400 feet of dildo!" exclaims Dr. Wu, "We were going to use the markings on the sides to see how much would fit in her, but she has gone well beyond her last test."
An assistant walks into the room and wheels in an odd cart. Julie lets herself slide down to the floor—her back arched forwards—her distended stomach preventing her from getting more than her knees and one hand to touch the surface. Sher reaches back, delicately inserting the tips of her first two fingers into her rear entrance. Those finger tips are joined by the third, fourth, and then her pinky. She takes a breath, relaxes her anal muscles, and pushes her hand into her rear. Jim and Sharon look onward stunned by the woman in front of them plunging her arm almost down to her elbow into her own rear end. Then Julie seems to find what she's looking for; she pulls the end of the dildo out of her rear and hands it to the assistant. The assistant hooks the end into a slot in what appears to be a reel on the cart and presses a button.
The reel starts spinning, pulling the dildo from Julie's body, and winding it neatly onto itself. The reel starts to pick up speed and shaft starts to wind left, then right, then left, then right, left, right, left, right. Julie's eyes clamp shut again. "Oh…mmmmMMM…oh&…Oh…MMMMM…ohOHOH," she lets out a wail.
Jim and Sharon watch as the reel pulls the dildo out of Julie. Left, right, left, right, leftrightleftrightleftright. The shifting of the shaft within in her abdomen causing her entire body to vibrate. Her abdomen starts to visibly shrink as the dildo vacates her body. To Sharon it looks like watching a timelapse of pregnancy in reverse. By this point Julie's wails have become a constant, near continuous sound as her body seems to shake with orgasm after orgasm.
She braces for a moment knowing what's about to happen. As the end flies out of her rear she lets out a cry, "mmmmMMMMMMMM…GAAAAHHHH!." With that she collapses flat on the floor in the large puddle of her juices. After a few moments Julie lifts herself off the floor and stands up. Her chest almost flat, her body smaller looking almost pubescently lanky for her height.
"A mere side-effect of the adjustable figure," Dr. Wu chimes in.
Julie walks back over to the steel tank and reattaches the tubes. She turns the valves and expands her breasts down to her thighs. She shuts off the valves and concentrates; her breasts shrinking down, her returning her body back to its previous fullness.
Tue Apr 07 15:07:37 2026