atom was still as adrianus adjusted the restraints, raising and angling its hips and spreading its legs.

"is that uncomfortable?" he asked. "this may take a while, so i don't want to put any unnecessary strain on your body."

"it's fine," it said. it was a little cold in the lab, without clothes, but it knew it would probably get used to it soon.

"that's good... now, let's be sure you're ready."

gloved fingers rubbed between its legs, pulling apart its labia, inspecting its vulva.

"you can feel warmth as i touch and stroke you here..." he murmured. "letting the blood flow and pulse... just put all of your attention... right here..."

his touches were gentle and slow, his finger carefully pushing against its entrance as his thumb held it open.

its body tingled, every touch becoming more sensitive and vivid as its blood pumped and all of its focus moved to its genitals, to those feelings.

the finger pushed inside, probing, testing.

"very good... that's it... your body is preparing to be penetrated... lubricating itself... becoming more open... just allow it all to happen... you're doing very well. the more prepared your body is, the more smooth and comfortable this will be."

he very lightly touched its clit as he worked another finger in, lightly stretching it. it moaned quietly, its body twitching slightly against the restraints.

"good..." he murmured. "the arousal will make it easier..."

after more probing, and rubbing, and stretching, he withdrew his fingers, covering them in a lubricant before pushing them back in, coating its inner walls with it.

"you already have plenty of natural lubricant," he said, "but it doesn't hurt to have a bit more, just in case..."

finally, the preparation of its body was done, and he rubbed the lubricant onto the end of the tube connected to the tank. it could see the small, shiny, black alien eggs suspended inside of it.

"just relax," he murmured, rubbing it against its entrance, carefully beginning to push it in. "just relax..."

it wasn't too thick, and it was rounded, so it went in easily. from there, he just kept pushing, bit by bit. it could feel it entering deeper, sliding along inside its body.

"it needs to go very deep..." he said. "all the way to the cervix..."

it hadn't been penetrated that deeply before, but it continued relaxing, as it was told, allowing it to keep creeping closer, to keep pushing, to keep filling more and more of its body.

he gave it another push, and its body jerked, a small whimper escaping its throat.

he put pressure on it again, more gently and carefully this time. "is that sensitive?"

it was trembling. "yes."

"does it feel a bit sore, or painful?"

"a little..."

adrianus stopped pushing, putting a dry, gloved hand on its abdomen and gently rubbing it. "just let yourself go numb... just right there... deep inside of you... let your body become numb, and relaxed, and open... it's alright... you'll just feel a pressure... a fullness... a stretch... a dull, numb sensation... and you'll just give in to it... you'll just be... a perfect little lab mouse for me..."

it felt a part of its mind dull as it listened and relaxed, feeling the numbness spread down through its body, from his hand.

he gently pushed again, and it was just a dull pressure. "how is that? is that better?"

"it is..."

"good... very good... just a bit more... just a bit more, before i put the eggs inside of you..."

there was still something intense about it sliding and pushing in, even when it was dull and painless. it was still a new sensation, impossibly deep, impossibly open. its breathing was heavy, its heartbeat fast and pounding.

he continued stroking its abdomen. "shh... deep breaths... just relax... numb, dull, and heavy for me..."

its breathing slowed, its muscles becoming loose again.

"that's right... good... only a little more... just a little bit more... i know you can handle it... just keep relaxing for me... just stay nice and open... deeply relaxed... all the way... through your whole body..."

he kept pushing, keeping the pressure, as it slid in, feeling as if it locked deep inside of it.

"there you go..." he said, with relief in his own voice. "is that alright? does anything hurt?"

"no, it's just... mm..."

"is it sensitive?" he asked, his voice low, his fingers running along its stomach. "is it pleasurable?"

it nodded.

"that's good... that will make it easier, and more gentle on your body and mind..."

his hand moved to the machine, twisting something, releasing one of the eggs through the tube. atom could see the bulge as it moved, until it pushed inside of it, traveling along deep inside, and was pumped into its body, released through the end.

it could feel it inside of it, sitting there, resting there. it didn't look very big, but it felt big in its body.

"how is that?" adrianus asked. "do you think you could hold all of them? i would like to insert as many as possible. your body should be able to physically handle it..."

just the one already felt overwhelming, but it wanted to be a good subject. "if my body can handle it..."

"let's try doing multiple at once, this time..."

there was a line of them being pumped through the tube, more quickly, with more pressure, each one being pushed deep inside of it, one after the other. it moaned and twitched with each egg, already feeling a stretch, already feeling so full.

he kept a hand on its abdomen, petting it when it became tense. "good, very good... you can take all of it... they'll all fit inside of your body... your body will stretch to accommodate them... it will accept them... deep inside of it... incubating them... nourishing them..."

he released the valve again, letting the eggs start coming through at a steady stream, leaving it open, without giving it a break.

"it feels good, as they enter, and slide along inside of you, as they stimulate your body... you're open... you're well lubricated... they can just push deep inside of your body, with no resistance... just let yourself enjoy the sensation..."

his hand was pressing into its abdomen slightly, feeling for a bulge as the eggs pumped into it, filling it more and more with every second. even just feeling the eggs slide through its entrance one after the other was overwhelming, but the pumping and stretching deep inside of it gave it a dull ache. it could feel itself swelling slightly, its stomach pushing outward against adrianus' fingers.

"good... that's perfect... just let them fill you... just a little more..."

its walls were twitching and pulsing and squeezing around the tube, but it didn't stop or slow the eggs, the pressure pumping them in easily. it was completely helpless, unable to do anything about it, unable to even talk between its moans and whimpers, as its belly was inflated with the eggs, engorged and swollen, growing slightly with each pump.

it was going to be pushed to orgasm. it wasn't part of the procedure, but it couldn't hold back, its thighs shaking in the restraints as the inside of its body spasmed, the squeezing only just barely slowing the last few eggs as they pushed inside, fully filling it up, its body almost bursting with both fullness and pleasure, the pressure and stretching sending it through another wave of its orgasm.

even if adrianus was done pumping eggs into it, it was intense just feeling them inside of it, just feeling them sit so deep inside its body. it continued to whimper just from the continued sensation, the dull ache, the feeling of how big its stomach had become.

"it felt good, didn't it?" adrianus murmured. "does it still feel good? does it still feel sensitive? it might feel a little extra sensitive, as you come down from your orgasm..."

it couldn't even respond, but its moans became slower and softer as he rubbed its stomach.

"that's it... you'll get used to it... just feel them settle inside of you... feel your body accept it..."

it relaxed again, feeling sort of tired and weak.

"you did very well... you did such a good job, taking all of it... letting yourself be filled completely... this is going to be very helpful... you'll give us lots of specimens to work with... and i'll be sure to observe everything that happens to your body... very carefully... so you'll be safe... and we'll have lots of data..."

it was finally adjusting, the fullness still ever-present but a little more distant.

it was soothed by his words, just letting go as he carefully pulled the tube out of it, holding still as he undid each of the restraints, and gently wiped away the wetness that was leaking out of them.