Rei does something inproper

Rei Ayanami does something inproper.

"Are you certain about this?" Rei Ayanami asked as she began to put on her plugsuit. The costume was still bulky, but laking it skintight is just the press of a button away. It left little to the imagination when properly turned on, but the improved synchronisation is easily worth the unintentional flaunting. This was hardly a concern right now, however.
"Yes." Gendo said, hardly looking the girl's direction. "This prototype LCL should improve the ease of movement. Perhaps if it felt more like air, I could get my son to finally-" Rei interrupts "Understood." It was not like her to ever interrupt Gendo, but even her patience was at it's limits when it came to Shinji's reluctance to entering the mechanical monsters. If it meant he would finally get inside, any danger is more than worth it.
"We'll be working in this old hangar. Your Eva stands ready." Gendo says as he guides his team to make get the computers ready.
"May I ask why we are so isolated? The base would provide easier readings." Rei asked, her head tilting just a bit, ut her expression remaining unchanging and stoic.
"The prototype may have side effects. The team thought it best to isolate ourselves, just in case.". There was not a slightest hint of concern in his voice. If Rei were any other girl, she'd have felt her heart skip a beat and her stomach form a pit. However, Rei Ayanami is not any other girl. She presses the button to pressurize her suit and begins to walk to her Evangelion unit. She has to work with a ladder today, but that's hardly anything major compared to her upcoming job.

As she entered her familiar cockpit, the communication systems come online first. A doctor she doesn't recognize appears first. He seems to have less detail about him than other people, some no-name doctor. But apparently, he's a biologist, here to test out the effects of the new liquid. The rest of the mech also turns on, and with it the tank begins to fill with the amber-colored liquid. At first glance, it appears no different than the normal, but as it began to submerge her, she felt a clear difference. Contrary to what was expected, the fluid is not only slightly harder to breathe, but also harder to move in.
"How are you feeling, miss?" The biologist said.
"Slower. The prototype seems to be heavier than the usual."
"Ah, that's normal." The man chuckles to himself."Give it a moment, and the additions should make up for the current discomfort. Just remember to stay calm."
"Hardly a problem. Will update when something new ha-" Her breathing stopped for a moment, stilted. She coughs up a bubble of air before finishing her sentence" Happens.
Something WAS already happening, though. It's just not something that Ayanami felt was relevant. As she remained here, she felt a small tingling in her breasts. Just the faintest little tingle, but one that seemed to worsen for every heartbeat.
It doesn't mean much, and it's not even unpleasant.

"Alright. We're going to ask you to try moving a little. Perhaps we need to get the muscles moving a bit before the compound becomes noticable." the doctor says again, hidden in the blue light. Rei can see Gendo in the background, stifling his hand and sniffing his gloves. He likes that position, it makes his glasses look so shiny... Rei shakes her head to shake off the momentary distraction
"Understood. Should I walk from one end of the room to the other?"
"That might be enough."
More systems came online, and the Eva wakes up fully. Slowly, Rei and the Eva unit take a step together, making the ground shake from the weight and size of the robot. The tremors reach up to the cockpit, and that tingle seems to worsen even more, all at once. Rei feels her heart hammering away harder than before, but not necessarily faster. It's just... The tingling is spreading all throughout her breasts, stopping at her nipples. There, it turns far more sensitive. Even with all her stoicism, Rei can't stop herself from blushing from the sensation.
"I'm detecting a slight increase in heartbeat... That should indicate it's working. Look around the cockpit, if you please. Disregard the screens for a moment."
Rei does as asked as the screens turn off. Her cockpit doesn't look any different, although she must admit she feels like she's getting used to the prototupe LCL. It feels a little easier to move around in, now, but still worse than the usual. Not to mention, she feels as if she's suffocating. Her plugsuit feels entirely too small, and that tingle...

She looks down, resisting the urge to rub her chest to try and alleviate the tingle, and notices something. Something big. Her breasts, which were already quite snug inside the plugsuit, making no secret about her D-cup, looked even bigger than before. Rei,  in an uncharacteristic display of emotions, swore to herself as he jaw fell open. With every heartbeat, she felt the tingle again. She diregards her earlier sentiment, and thrusts her hands to her mammeries. She can feel her heartbeat through the suit, and with every thump, her breasts grew just a tiny bit. She felt her fingers spread out, millimeter by millimeter with every heartbeat. She felt the slightest start of panic, and her heartbeat speeds up. And with it, the growth.
The suit begins to creak as her nipples began to show through the tough material. The tingle was spreading, and it was making her whole body hotter. Soon, she felt like she couldn't get enough oxygen, and she coughs a few times before gasping up more of the LCL. She felt her whole body begin to tremble, as if her muscles were all working overtime just to be ACTIVE. Suddenly, she bumped her head against the roof of the cockpit. As she flinched, she squeezes her breasts. Her vision blurs as the tingle is turned into outright pleasure. She moans a small "ah!" as the feeling explodes forth, her breasts growing ever faster as the material creaks and bulges. Her skin can be seen through the material, stretched to its very limit just before exploding! The suit snaps back, hitting her abdomen and causing another spread of tingling.

Her breasts, exposed to the prototype, feel so sensitive she can barely think; She feels her legs clench even harder, even through the constant trembles she feels. She feels herself climax in the suit, her wetness leaking along her inner thigh, kept dry only by the suit. Her head slides forward as she has to crawl into a fetal position to prevent bursting out. She's growing faster!  Her stomach gurgles as she her breasts reach her knees. They are F-cups now, no impossible size, but still she feels squished in the rapidly worsening conditions of the pod. Warnings begin to beep, but she can no longer reach the controls properly. Fighting through the pleasure, however, she reaches towards control to let her open the cockpit. It's an emergency switch, as you're supposed to drain the valuable LCL first. But it was either that or getting crushed, and there is more LCL than pilots.
When the door opens, Rei bursts up out of the Eva-unit. Her breasts, covered in liquid, heave upwards out of cockpit as she finally uncurls herself. The girl hears some swearing from the research team, but she can hardly hear it over her newfound freedom! The cold air brushes over her nipples, and she shivers in pleasure as she feels herself clench again in a second climax. She groans, gritting her teeth as her face flushes with shame. However, the mech topples forward from her increasing weight, and she falls out! She falls to the floor as a wet and slippery mess. She gets up on her hands and knees, but feels another wave of pleasure surge forward. She feels her back strain against the suit for aa second before bursting out of it entirely, elaving the fabric completely gone. After her torso snapped, the rest follows quickly, her limbs left naked as well. Slowly, she begins to stand up, keeping her face as still as possible, gritting her teeth to avoid showing emotion. She can't stop herself from shaking as she covers her breasts and pussy with her hands, her shaven bush free to the world. The aftereffects are still going, however, and touch her nethers, even with the slightest graze, is enough to make her nearly explode again in pleasure. Her knees buckle, and she can't resist a twitch of her head as she gasps in pleasure.

Finally coming down from the high, she sees just how large she has become. She stands at a solid five meters right now, and her breasts have grown even more, proportionally. Nearly as big as her head, she squeezes them together in her effort to cover herself.
Suddenly, the doors open. Gendo walks forward, looking completely unfazed. The background researcher is trying to explain himself desperately as Gendo looks up at the giant woman.
"Rei. Do you think this is over?"
"I-I t-think it m-might n-*nuhhh* NOT buh-be over!" She forces out, her voice strained as she tries and fails to keep her constant cascading pleasure a secret.
"Hm. I would think not. You are aroused to the point of reduced function, a side-effect of the prototype's efforts. I need you to calm down before you can give me a report." Gendo turns to the researcher that followed him, the man shrinking before Gendo's gaze.
"Turn off the camera's. We will continue on her signal. I need this shitshow over and done with!"
"S-sir!? W-what am I-*Ah*... S-supposed to do?"
"I think you can figure it out. Your hands should suffice, as you are now."
Rei scrunches up her face a little as Gendo walks away through the doors.

With a resigned sigh, Rei sits on her ample behind, feeling a small rumble. Slowly, gently, she begins to push her finger against her lower lips, ever so slowly making headway before the single finger enters, made easy by how wet she is.
*Ahh!*
With one finger in, two others are quick to follow, and she begins to rub her pussy to the best of her ability, using her off hand to vigorously rub her clit. With her being so aroused already, she cums again soon, falling to her knees as she splatters the floor with her fluids. She begins to breathe faster and faster, the one orgasm not nearly enough to sate her in her state. She feels herself trembling again, not just from pleasure. She feels herself stretch as her Eva-unit begins to look less and less like something impossibly large, her belly gurgling on occasion as she grew more and more. She climaxes again and again, her growth only fueling her arousal. She changes positions throughout, sometimes on her knees with hands on or in her pussy, sometimes on her back, fondling one of her massive breasts as she grows more and more. Once she reaches a large enough size, she begins toe experiment, putting large metal beams, once too large and heavy to be moved by anything other than a truck, now used as a toy for the new giantess. The size of her breasts makes it possible for her to squeeze them with both hands and lick the nipples. She begins to delay the gratification ever so slightly, her composure and discipline perverted to a singular purpose. After half an hour of self-pleasure, she finally climaxes a final time.

Panting, spent and more than a little thirsty, Rei finally feels cooled off. She begins to stand up, standing as tall as her own Eva! The ground is so far away now, and her body... In the afterglow, it takes some selfcontrol to stop herself from lifting her breasts again, to feel their weight and size...
After a while, the metal doors open again. Gendo still seems unperturbed, even though Rei is nearly ten times larger than earlier.
"The steroidal compound is a failure, clearly. We'll need some other way to get Shinji in that damned robot."
"I wouldn't mind him inside me..." Rei says, fidgeting and rubbing her thighs together.
"rei das gross."