Weird science!

Tali bit back a groan as she stumbled from the elevator onto the Normandy’s bridge. One would think that, after getting her balls worshiped by her crush and blowing a massive load over the human’s armour, her new addition would have calmed down a little. They would be dead wrong - in fact, that first session seemed only to have woken it up even more. Tali had been bombarded with vivid daydreams on the whole trip up from the Medical Bay, often at the worst possible time - she’d barely dodged an awkward hallway encounter with Doctor Chakwas while her mind had been preoccupied with a vision of Shepard’s lips being stretched paper-thin around her shaft, then literally crashed into Kelly Chambers just outside of the elevator while wondering how the Commander’s mouth would look with her jaw stretched by the Quarian’s engorged knot. It had taken an agonisingly long time for the pair of them to untangle themselves, not least because (despite her profuse apologies and otherwise normal reaction to physically running into someone) the redhead’s hips seemed to have a mind of their own as they ground her crotch against Tali’s bulge.

So, to summarise, Tali was already more than a little riled up when she arrived in the (still ‘mysteriously’ empty) room containing Joker and EDI.

“Please come up to the cockpit, Tali.”

This time Tali did groan, especially at the way EDI’s voice seemed to emphasise a certain syllable. She walked - waddled, really - to the cockpit door, where she tried desperately to wrestle her bulge into submission. She failed, because it’s that kind of story so of course she did, only managing to turn the pronounced lump in her suit’s crotch area into an equally prominent sausage-shaped bulge running down one leg and a pair of slightly smaller lumps in her suit’s crotch. Honestly, she thought, whoever had designed her envirosuit to stretch and retract so much without deforming or sagging deserved a medal. Breathing deeply and trying to ignore the way that action made the muscles at the base of her cock flex, she opened the cockpit door and stepped inside.

“Thank you for cumming so thickly, Tali.”

Tali was practically yanked the rest of the way into the room and over to where Joker sat in the pilot’s chair by EDI, the AI’s grip on her wrist impossible to break. She was so surprised that she couldn’t suppress a small squeak of shock, nor could she believe what she’d just heard from the synthetic woman.

“I-I’m sorry EDI, what was that?”

“Thank you for coming so quickly, Tali.”

“R-Right.”

Yes, she’d obviously misheard. There was no way EDI would talk like that, even if her mouth seemed to be fuller and lusher than… oh. There was no ‘seemed to be’ about it; EDI’s lips were so plump, so glossy, that Tali found her mind drifting back to visions of stretching someone’s mouth around her new tool. This time, though, the subject of her depraved throatfucking fantasies was - to the best of Tali’s knowledge - blissfully unaware that her shiny black lips were currently being reimagined as the galaxy’s most luxurious cockring.

“Do you think I’m tight?”

She would be, too. So tight, stretched around Tali’s rod. The Quarian could feel her cock pulsing at the lewd thoughts filling her head, could feel her balls churning, but the near-agonising tightness of her suit seemed to disappear as she hissed out her response.

“Yessssssss…”

Wait, no, EDI wouldn’t ask that!

“W-wait, what did you just say?”

EDI looked up at her with a small smile.

“I said, ‘do you feel alright?’”

“Oh, um, yes. Yes, I am.”

Wait a minute, looked UP at her? Tali realised that she was now looking down at EDI’s face, the gynoid having sunk down into a squat. Her mind finally focused enough on reality for her to take in her position and she couldn’t help but groan as the reason for the sudden release of pressure on her dick became apparent. EDI was squatting with the backs of her thighs resting on the backs of her calves and her legs spread, letting Tali drink in the sight of a pair of unnaturally well-formed teardrop breasts wrapped in a sinfully tight Alliance science division uniform. Dragging her eyes away from the AI’s spectacular bust - keelah, it’d look so good feeding a baby or twelve, they must be as big as her head - didn’t bring her any respite though, because she then spotted what else EDI was packing. Hazy, half-remembered snippets of shore leave on the Citadel and an **** Shepard’s ramblings floated to the forefront of Tali’s mind, although she didn’t quite have the social context to understand the full meaning of ‘junk in the trunk’ and ‘awesome ghetto booty’. It wasn’t too difficult to guess though, with the way the sight of EDI’s spectacular backside - practically shrink-wrapped in the uniform’s fabric - made her rod give an extra powerful throb; enough to noticeably lift it, despite the fact that even when erect it was pulled down almost horizontal by its own weight.

“Oh! Oh…”

Ah, yes, that was the other thing. EDI was squatting just low enough for her mouth to be level with Tali’s meat as the fingertips one hand rested, so lightly that Tali didn’t even notice them at first, on the ridge of flesh running up its underside. Her eyes were locked on a fat drop of off-white fluid that was slowly forming at the very tip of the massive purple shaft, her hand slowly pushing Tali’s rod up until the tip was above her head as her gaze swept along its entire length.

“I believe I understand why you are exhibiting signs of anxiety, Jeff. The difference in size between your reproductive organs is… hard… to process.”

Shit, Joker! Tali had been so caught up, first in her lingering arousal and then in the sight of what must have been a new chassis for EDI, that she’d forgotten that the human was even there. Although, given the look of embarrassment on his face and the way his own member almost appeared to be wilting just from being in Tali’s presence despite the expertly-done handjob that EDI was distractedly giving him, he probably would have preferred it to stay that way. Wait, she was still talking as well.

“Even though your size is not actually changing, I can feel you… shrinking… in my hand, becoming less and less impressive. It is almost as if my sense of scale is being redefined. Intellectually, I know that Tali is only a little under four times your length and three times your girth, but my visual sensors seem to be feeding me incorrect data. After all, if they were correct, then - based on your known size and the proportional difference between you that they are feeding me - her slut-stuffer would currently be smearing precum against the cockpit window. It is an… unusual sensation.”

Joker seemed to wilt at the gynoid’s words until he spotted that Tali was looking at him, managed a sickly smile and mouthed something at her. It took her a moment to parse it, but eventually she managed to figure out that he’d said ‘role play’. It was odd - and disturbing in how little it disturbed her - that she mainly felt disappointment, rather than relief, that EDI wasn’t ditching their relationship to be her fulltime cock-socket. Speaking of whom…

“In addition to my sudden awareness of just how pathetic you are in terms of size, the scent of Tali’s… ‘cock,’ I believe would be the appropriate noun… indicates that she is substantially more fertile than you. Based on olfactory data, I would estimate that her precum is thicker, hotter and likely tastier than any other race’s proper ejaculate. Between her enormous size and incredible potency, I believe that I may finally have found an advantage to your condition, Jeff. After all, this way you can pretend that my unwillingness to let you use more than my hand is for a reason other than the fact that Tali’s cock makes you prick look so small and pathetic as to be practically non-existent.”

Tali and Joker both groaned simultaneously - but where his was a wordless announcement that he was currently cumming all over EDI’s hand, hers was one of frustration as her balls somehow churned even more and grew even heavier.

“I believe, based on the… difficulties… I am having parsing data from Tali’s reproductive organ, that I am currently in a state that organics refer to as… ‘cock-shock’. For reasons I… do not understand… just looking at Tali’s… ‘cock’ is not enough, ‘monstercock’ would be more appropriate. I feel as if my ability to process is being… overwhelmed… just by looking at it… smelling it…”

EDI’s next words cut Tali’s self-control down to the bone.

“I believe I am beginning to understand now… The organic impulse to… WORSHIP.”

And then, mouth open in a perfect 'O', the gynoid lunged...