So many times had they had almost been caught. Twilight's friend and in a way now, apseudo 'psycologist'. Helping Dash have a breakthrough with her hoof sensitivity, how ever forced it was, and was determined to see her completely into no problems at all. Though this merited many 'sensitiity' sessons with very little result.
Dash was determined to get over this. Each sesson felt roughly the same on her hooves, though she though there may be a slight change. This compelled her to visit Twilight regularly, the sessions only numbing her hooves for a few days, then back for more 'treatment'.
Either through items from the session placed about the room, or the inevitable gag falling off of Rainbow's muzzle and bubbly deep laughter through the halls. Twilight kept evolving the methods to be as quiet and efficient as possible, all of this just practice for this final implement.
Rainbow arrived for a 'therepy session' and was promptly encased in a rubber suit, the hooves on all her fours were open. Twilight grinned as she slid Dash into the hood and closing it tight. There was no way she was going to free her muzzle now. It was sweet tiny muffled laughs from here on out.
"I thought of a more positive method to sensitize you this time Dashy," Twilight said and patted her on the head. "I have thought to pair the ticklish feelings with something more, pleasurable."
Dash grunted lightly under the hood, in question to Twilight's meaning, but then from a cool presence that penetrated both her plot exits at once. The cool gel on the side of the toys helped them glide in without effort. She grinned as much as the gag would allow. So this was the feelings they were going to pair... awesome!
The willingly pliable pegasus was easuly tucked into a hole barely larger than she was. Her body sunk into the rubber liner filled with a thick gel, it's presence diminishing with her weight upon it. Straps pulled her hooves tight to a 'hoof rest' of the liquid. Small pushes in her plot as something was hooked up to the toys.
"Now, this system is automatic. I put you in and a machine goes to work where your hooves are strapped down and you are completely immobile and silent! But I also had a set of stocks built into the window, so I can interact with your needs personally."
Dash's hooves were guided down into the cell where they should be, then out to the stocks, where they were locked down. She squirmed, the fact of a machine tickling her, they didn't how much was too much like Twilight did. They were going to send her into oblivion...
"Now, I will let you feel what I can do to you from outside. Without explaining it, because that would ruin the surprize."
Dash shifted uneasily as a thick piece of lexan clunked, sealing her inside. The walls felt cool for a second, the cold gel mixing with what her body had warmed up. The pressure drove the walls out, gripping and wrapping around her every appendage. It felt like water was rising around her, stopping to cover everything but her face and muzzle in it's grip. Everywhere she tried to move, the gel held her back. She was going to be immobile.
While she waited in the silence of hearing her own breath, she felt something incredibly full of soft volume pass between her frogs, the moset sensitive area down there. Instantly her hooves pulled back, though they did not move. The only thing Dash could wo was wriggle her rear hooves outside of the cell. The gag stifling everything she pleasurably screamed out.
"Extra sensitive today..." Twiligh tmused. She opened the window and spoke to dash, "I'm going to have to take you through an intense de-sensitization before I can manually help you. You shouldn't miss our appointentments."
Twilight released the pressure on the gel and tucked Rainbow's hooves down into the cell for the machine to deal with. Then she brought out the oxygen hose attached to a muzzle and slipped it onto Dash's rubber head. With Dash all ready for the total encasement, she slowly started to increase the pressure in the gel.
She swung a large protruding piece that had been missing and placed it into the empty space that wasn't previously covered. It was hooked to the pressure system and gel started to fill it, closing in over Rainbow's form.
The door clunked shut and clear rods entered the sides. It was going to have to hold alot of pressure. The blue of Rainbow's suit disappeared and was replaced with gel filled rubber pressing outwards on the lexan. Twilight felt ripples inside it and subsequently the pressure was increased to completely imobilize Rainbow.
Pressed in on every point like an eight-g turn, Dash mumbled something that was completely lost in the gel around her. Her breathing returned to normal, the air hose increasing the air pressure so that her chest wasn't crushed under the weight. It was going to take her several hours to decompress after that. But Dash didn't know that.
Dash suddenly felt the plugs expand, growing thicker and longer deep inside her. Stimulating her in ways she had never felt, as the pressure outside was compressing downward on the thickened plugs, forcing her entire tract to draw tight aroud the toy. She could feel every ridge, every ring and the imperfections present in the toy. It was a bit off round, feeling the slight depression on a single side.
Then they started to vibrate. There was no air, no room for the toys to wiggle, they just imparted their energy 100% into her walls. The toys were practically one with her at this point, conjuring a super cell lightning storm dirrectly into every nerve in her plot.
A murderous howl was silenced by the gag and the sound deadening walls. Twilight couldn't hear her, couldn't hear anything, but she knew what Rainbow was feeling, well, she couldn't toss her best friend into a dangerous machine. It was thoroughtly tested, for a continuous week by Twilight herself.
She touched the side panel and randomized the brushes under her hooves as well as the inflation and vibration levels of the toys. A low whirr let her know that it was working and she could leave.
Twilight moved the bookshelf back into place. As far as the world knew, there was nothing here. She left the basement of the Crystal Library and locked the door. Hopefully a few days would be enough time for a manual session.
If Rainbow was able to sucessfully feel a sexual pleasure when her hooves would be touched, she would be less likely to avoid using them. To walk as normal ponies did, but unlike the rest of them, she would feel each hoofstep a thunderclap of pleasure.
After all, this wasn't rude. Rainbow had conscented 100% to 'Dr.' Twilight, whatever she saw fit for her treatment. And what Twilight saw fit was a pleasurable pairing. And those take time. Lots of time.
Months even.
