"Hey Dylan! Stop jerking off for a moment and come with me into my lab!" Carol shouted as she barged into her stepbrother's room wearing nothing but a pair of tight yoga pants, a sports bra, her glasses and a lab coat.

"Jesus, Carol! How often do i have to tell you to knock?" Dylan replied without a bite and didn't even bothered to take his hand from his hard cock or hide his lap top playing the porn right now as Carol threw herself on his bed beside him.

"Titty Fuck with giant breasts, huh? Hot!" she commented and looked up at him with her amber eyes, giving him a good look into the cleavage of her B-Cup tits.
"Anyways i really need you down there. I'll finish you off as a reward."

Dylan thought about it. Ever since their parents married one years ago the young woman of 22 and the 20 year young man were on a "benefit" basis which usually meant he would act as a guinea pig for one of her experiments for her to get him off in return. He never regretted since she was easily 7 of 10.
The only thing he might wish that the red headed short stack with her 1.52 meter was a bit taller to his 1.89. And maybe her tits could be a bit bigger but otherwise there was nothing to complain. Still though thinks sometimes tended to get weird with her now and then lately she just...

"If you only want another sample..."

"No, no, no! Actually i finished it! And besides I'm tired of not getting to swallow your load as well."

Dylan raised his brow.
"Your steroids are finished?"

"It's not steroids!" she complained.
"Its a genetic enhancement. It should work almost instantly, have aphrodisiac effect and should have no negative side effects. And it's directly catered to your DNA."

"Seems like a stretch," Dylan noted.
"Is this even scientifically sound?"

"More bypassing scientific suggestions, honestly," Carol admitted.
"Buuut you're talking to the mad scientist who made a car run by hooking it up to a banana as battery. I'll say i can get a pass here.

"Fine," Dylan relented.

"But i better get a class A blowjob out of it if i blue ball myself for you."

Carol smirked.

"Only a blowjob?" Dear stepbrother of mine, if it works as intended you'll be fucking me for days nonstop. Why do you think i hurried to get it finished now that Dad and Jennifer are on their vacation?"

A short while later Dylan was down in Carols lab in the basement, wearing nothing but boxers with a clear bulge of his semi hard cock while Carol injected some weird fluid into his arm with a syringe.

"So if the simulations are correct you should show signs of improved physical condition in a few minutes, as well as enhanced libido."

"So that's what you're after, huh?" Dylan replied half insulted half jokingly.

He was not very sporty but he did kept a good shape so her comment did sting a little.

"Well no but is nice a bonus," Carol admitted sheepishly.
"I'm more interested in the effect down there."

She pointed at his crotch and to Dylan's surprise a wave of lust suddenly rushed through his body, causing his cock to got fully hard, making the bulge in his boxers bigger. And bigger. And bigger, nearly ripping the pants of from him as he went from a 15 centimeter hard cock to nearly 30 cm, his girth almost doubling as well. Even his balls swelled on.

And that wasn't all. Like Carol said his body seemed to bulge out a bit, creating more defined muscles, broadening his shoulders and overall making him fitter and stronger. He would admire his new physique more if he wouldn't have been distracted by another jolt of lust from the tip of his cock rubbing on the fabric of his tight boxers, a wet spot forming from the pre-cum pulsing from it.

Carol licked her lips, eyeing the outline of of Dylan's new monster cock, nipples pocking the fabric of her sports bra and a wet spot forming at the crotch of her Yoga pants.

"Stage One was a success," she purred.
"Now i have to run some tests..."

She gently pushed him back to sit on a nearby table, got on her knees and pulled down his stretched boxers with considerable effort and let his cock spring free and hit her face.

"Test subject seems in good health and enhanced vigor. I'll proceed to collect a taste sample from Test subjects... "enhancement"."

With that Carol grabbed Dylan's penis and began slowly to kiss the down side of his shaft, each kiss going just a bit lower until she reached his swollen ball sack and the next kiss transitioned into sucking on his testicle while her free hand reached for the other and began to carefully massaging it.

With a "plop", her lips let go of the ball and she could swear to hear his jizz sloshing inside when it swung back while Dylan was moaning causing her a tingling feeling in her crotch, the wet spot in her pants growing soaking the fabric and her aroused pussy lips outlined.

Sticking out her tongue she gave short licks to his balls and started moving back upwards his pulsating cock until the tip of her tongue touched his gland, causing Dylan to gasp and more pre to flow from his tip.

"Test subject shows signs of enhanced sensitivity," Carol smirked.
"Extracting of the taste sample might be proceed faster than usual."

With that she began licking his tip, wetting it with saliva and pre-cum before she close her lips around his cock, taking as much of his length in as she could, sucking and bobbing her head back and forth while her tongue danced over his tip, one hand still fondling his balls, the other holding the part of his shaft she couldn't get in her mouth.

Dylan's moan grew more forceful and erratic, growing into growls as he came closer and Carol closed her eyes in anticipation just before he came in her mouth.

Warm and thick cum shot into the mouth over and over again, salty and creamy, far more than she was used to from Dylan, threatening to make her choke as she swallowed each shot until she noticed something unexpected.

The hard cock in her mouth shrunk. It didn't get soft, it just got smaller.
Confused she opened her eyes and let the penis go in surprise as she saw that Dylan was shrinking, shooting another spurt of cum on her face and chest until he was around half his original size, eyes still closed and panting from the afterglow as she rose to her feet and looked down at his diminished form.

"Dylan? Please open your eyes and do not panic," she said, putting her hands on his shoulders as he did as she told him and nearly jumped in surprise when he notice how much bigger she was.

"Holly shit! What happened?"

"Like i said: Don't panic!" Carol replied while helping him down, realizing that he now stood around her waist when she earlier barely reached his shoulders.
"Looks like there were some unforeseen side effects. Don't worry should, GRAH!"

A surge of pain shot through her body, combined wit the feeling of a building climax in her crotch as she suddenly began to grow slowly, not just in height. Her hips widening, her thighs and ass becoming more defined and firm, the fabric of her yoga pants ripping at places from the new mass. Her chests ballooning out, stretching the already tight sports bra, barely able to contain them, her nipples erect.

Panting she tried to recover and both realized that he now stood just below her waist, just a bit over half her size.

"Holly fucking shit..." Dylan muttered, unconsciously grabbing his cock which was getting hard again despite the fact that he just came a moment ago.

"Wow... okay that was... intense," Carol muttered herself letting her hands glide over her body and cupping her breasts.

"Give... give me a moment..."

She turned around, picked a petri dish from a cupboard and collected Dylan's cum from her face and chest with it and put it into a strange machine, prepared a new syringe and turned back to her stepbrother.

"Okay Dylan, i think i have a idea what happened. Should only take a few minutes to confirm and..."

She stopped mid sentence as she saw him stroking his cock, pre-cum dripping from it's tip and only as he saw her looking down on him did he seem to notice.

"Sorry... Don't know what came over me..."

"Nonono! It's okay," Carol assured him.
"It's the genetic enhancer, It drives your libido into overdrive. I wasn't kidding when i said you'll be fucking me for days. But... eh... you might want to hold back on that for now. Unless you want to get... even smaller..."

"That... that can happen?" Dylan asked unsure, feeling a twitch in his hard cock as he imagined Carol standing even more massive over him, completely missing her hungry gaze on him.

"Most likely as long as the enhancer is in your system," she said bending down, placing her breasts in the way to tight bra right in front of his face

Like i said, i have already a idea what went right... i mean wrong. I just need a confirmation. But how about we measure how big we both are now while the scanner is doing his job?"

Dylan could only stare at the massive tits in front of him as he nodded and Carol rose back up, let the lap coat slip from her shoulder to the ground and ripped the sports bra from her chest with a grunt, freeing her tits, the nipples standing erect in the cool air of the lab and proceeded to rip the front of her yoga pants almost down to her pussy, showing some neatly trimmed red pubic hair.

Dylan had to swallow nervously seeing the sexy display towering in front of him, his penis twitching as she led him to a wall with a electronic scanner and shortly after they knew their new measurements.

Dylan was exactly 94.5 cm tall, exactly the half of his original size, though he kept the proportions he had, including the gained muscles and mass of his penis.

Not that it mattered from Carol's perspective, who now stood at 1.67 meters tall with her chest being now a solid D-Cup.

"Huh... i thought they were only C," she mused while cupping them in front of Dylan, not paying attention how much she was teasing him as the PC of her scanner made some beeping sounds. Walking over to check the results she gave Dylan a clear view on her ass.

"God damn... you could bounce a coin on that..." he muttered causing Carol to giggle and shake said ass a little, straining the already stretched fabric of her pants before she sat down on her chair, turned back towards Dylan.

"Okay, I'll have a couple of good news," she said while leaning back.
"In short what happened is that we had a Reality Push Back."

"A... Reality... Push Back?"

"Right," Carol nodded while crossing her arms, pushing her chest together.

"Basically what separates a mad scientist like me from a regular scientist is that a mad scientist is always trying to archive things that are generally considered impossible. Like faster than light travel, creating mass out of nothing or making Jared Leto into a descent actor. All this is considered impossible until it isn't."

"Sounds more like magic if I'm honest," Dylan said while he did his best to ignore the throbbing of his boner, seeing his near naked stepsister lounging in her chair.

"You'll be surprised how close science and magic actually are," Carol shrugged.
"Anyways, sometime reality doesn't like it when we break some of its rules and tries pushing back. Mostly via side effects. Those can range between change of skin color, displacement in time, opening a gate to hell or in your case..."

"...shrinking when i cum?" Dylan finished the sentence and getting a nod from Carol.

"Kinda. The genetic enhancer worked too fast for reality and pretty much you loose half your size every time you shoot your load as long as it's still in your system. The good news is that it should only be a few hours. Bad news is that you will be horny the entire time. But after the enhancer is purged from your body i can reverse the shrinking."

"Okay... okay, i think i get it." Dylan nodded:
But why did you grow? And... well..."

"Became hotter?" she smirked, leaning forward and letting her breasts swing in front of his face before leaning back, smirking as clearly struggled to keep his hands of his cock.
"Well the mass you lost was more ore less turned into genetic data in your sperm. And when i swallowed your load..."

She gestured towards her body.

"So you basically sucked the size out of me." he said while letting his gaze travel up and down her massive body.

"You could say that", Carol giggled.
"Though a lot of your mass didn't transfer over or it was used as energy when i grew. Still, i can't complain about the result."

She stretched her upper body, jutting out her chest, squeezing her breast with one hand and rubbing her other hand over her thigh.

"Would you like to grow more?" Dylan blurted out. surprising Carol before she leaned forward again smirking.

"Maaaaybe. Why? You offer to donate?"

"I... i mean, if you like... though in theory, how small could i get and how dangerous would it be?"

Carol thought about it.

"Hm... if i had to guess, around a tenth of a millimeter, provided you'll cum enough times. And as far as i can tell, you'll get more durable every time you shrink. The biggest danger would be that i loose sight of you since that would be a size were you'll be barely be visible with the naked eye and it would be really hard to see more then just a speck."

"A... tenth of a millimeter..." Dylan muttered, looking at her nipple, imagine what it would look at that size and this time he couldn't help but starting to stroke his arching penis, smearing his pre-cum over the tip.

"Okay, okay. I get it!" Carol laughed and rose from her chair and bumped his shoulder with her hips.
"Give me a moment, squirt."

She went to a nearby room and rolled a medical bed into the lab and helped him up to sit on its edge while she knelled down in front of him and wrapped her breasts around his cock.

"It's kinda funny, you know?" She purred
"You shrank to half your size but your rod is around the same size as it would be before i gave you the enhancer."

With that she spit on the tip of his boner and started to move her breasts up and down, lubing it with the saliva and and pre-cum all the while looking him straight into his eyes with a smirk. Which proofed to be easy for her considering face was almost on the same level as his, so much so that that she eventual leaned forward and kissed his lips, her own completely covering his, her large tongue invading his mouth while she kept grinding his shaft between her tits.

Dylan couldn't fight against her and honestly he didn't want to as she could only grunt, coming closer to climax. Finally she let go of his mouth, a spit thread hanging between her tongue and his lip for a moment, her eyes sparkling mischievously behind her glasses.

"C...Carol... I'm about to..."

He wasn't able to finish the sentence as she lowered her head and started to suck his tip while squeezing his shaft between her breasts as if she wanted to milk every bit out of him, driving over the edge.

For a second time in short order Dylan shot his cum down into Carol's throat as the world around him started to expand, his orgasm seemingly not ending as he shrunk smaller and smaller, causing Carol to shift and letting her breasts slide off his lap just so she could continue to swallow his load until her face was bigger than his entire torso.
letting her tongue collect the rest of his cum she let go of his penis and gave him a clear view into her mouth before she rose to her feet, peering down on her now toddler sized stepbrother.

Dylan on the other hand found himself looking right at her belly as she stood before the bed, watching has her hand slowly glided down her body to her crotch, sliding her finger into her yoga pants, widening the tear in front and started to rub her slit as she started to grow with a grunt.

She gained only half of the last growth but it was still a considerable gain, especially from Dylan's reduced viewpoint. And like before it wasn't just height she gained. Her hips widened again and her legs got more defined while finally bursting out of the yoga pants, leaving only a few hanging.
Her belly stretched and smoothed out as she grew, becoming toned and firm. Her chest gained at least another cup size and her arms, while still remaining slender for her new frame starting to show some slight muscles.

And all the while she was cumming, rubbing her clit and cum dripping down her legs to the ground.
Finally her orgasm subsided and she leaned forward panting, her arms resting on the bed, her breasts knocking Dylan on his back and smirk she used them to pin him to the mattress, panting satisfied while Dylan found himself underneath a pair of tits, each one at least double the size of his head, forced to look to her hungry eyes. It was a testament to her glasses that she was still able to wear them and seeing his reflection in them, trapped under Carol, caused Dylan the first time to feel fear as he realized that Carol became akin to a demigoddess for him and the hunger in her eyes made clear that she wouldn't stop reducing him until she was a full fledged giantess, no a godess to him.

And more frighteningly: Dylan could not deny that it turned him on.

"I can feel your little cock getting hard again," she whispered.
"Are you so eager to become a speck? Because if I'm honest, i can't wait to make you smaller and smaller. It turns me so on..."

Part Dylan wanted to tell her no. Wanted to ask her to stop, to wait till the stuff she injected him with stopped working and bring him back to his old size.

But a far louder part of him, driven bey desire, pushed past all that.

"Make me tiny..." Dylan heard himself say.
Make me cum and shrink me until your clit dwarfs me... until I'm nothing but a speck on your nipple..."

Carol's grin nearly split her face.

"Wish is granted..." she breathed sultry, rose back up while lifting him under his arms, just to sit on the bed with Dylan placed on her lap, a nipple pressed into his mouth which he instinctively started to suck on while she took his hard member carefully between her finger and started to stroke it.

"Of course that means you have to satisfy me too..." she whispered.
"Although at your current size, you are both to small and to big for me to be of use... let's fix that!"

Her fingers danced with ease over his manhood and far to soon did he cum into her large hand, getting smaller again until he could stand on her thigh while she caught as much of his seed as she could and made a show to lick the, from her perspective, small amount of cum and let Dylan watch as she swallowed it and shortly after he nearly lost his balance as her body expanded.

Clearly less than the last time but still a fairly noticeable for Dylan who struggled keep his balance on her thigh, seeing her body getting more fit, fitting for the goddess she now was for him.
A sentiment only enforced when she picked him up with just one hand and lifted him to her face while she put the head up and laid back on it.

"You know, when my math is correct, and we both know it usually is, then you should be around 23 and a half centimeter. A Barbie doll would dwarf you. Or your hard cock for that matter."

She giggled as she set him down between her spread legs letting her finger glide over her trimmed landing stripe.

"But you are still more than big enough to act as my dildo."

Dylan looked at her crotch, most specifically the swollen pussy and the glistering clit.

"You want me to..." he began but was cut off by Carol.

"Oh my, you going to have to speak a lot louder from now on. And yes, i want you slide yourself in my pussy and pleasure me. I also want to see if i can absorb your lost mass down there as well. Truth be told i wouldn't gain much from it anymore. I should be around 1.80 meter now and considering the rate the effect diminished each time i would only grow a centimeter or so. Sure there are other benefits i gained..."

She let her hands glide over her body.

"...but I'm actually satisfied with what i got. And in case it would work... well i wouldn't complain either. So i won't really loose anything, have the chance to gain a little bit and we both get the pleasure of you shrinking in my pussy while i cum around you..."

Dylan looked up at her face behind her breasts to see the look in her eyes that said that she would get him inside her, regardless if he agreed or not. And as much as he wanted it himself, the fact that she got so much power over him frightened him more and more. Especially since it seemed it took less and less to make him cum and shrink him the smaller he got.

Swallowing his anxiety he stepped forward and did the one thing he could think of to regain at least the illusion of some control. He put his hands on her pussy lips and began to caress them while kissing her folds over and over. Of course he couldn't be sure about how much it would work until he heard her moan and whimper.

"Dylaaaan... you tease. I'm already wet. Stop... stop with the foreplay and get inside me!" Carol whined but without any bite. She wasn't lying though, she was soaking wet and her clit was erect above Dylan's head..

He gave her pussy a last kiss before he took a step back and called out with a smirk.

"I don't know! Looks like i could need a hand down here!"

"You're demanding a lot," she replied with faked anger.
"Especially for a sex toy soon to be bug, you know? But fine. Since i am so nice, I'll help you."

Smirking she grabbed Dylan gently with on hand and aligned him with his feet towards her pussy while spreading the lips with the fingers of her other hand before slowly inserting him, carefully pushing his body into her quietly moaning with each bit that entered her canal, the wet walls squeezing his body until his feet were touching the end and he stuck up to his chest inside of her, his arms still free, her clit right above him in reach of his hands.

"You should start to get me off." Carol purred

"Or I'll do it myself."

He didn't need to be told twice as he grabbed her clit and started to stroking it while kicking her walls inside of her, causing her to cry out in pleasure, her pussy pulsating and squeezing Dylan's body and most importantly his penis as if to challenge who would make the other cum first.
Not wanting to give up, Dylan doubled his efforts, kicking stronger until his knee hit a point that caused Carol to gasp extremely loudly and focusing on it making her pant and moan louder and faster, while he also leaned forward to suck at her large clit, racing against his own building orgasm.

And just before he reached his limit, Carol cried out again, the walls of her pussy tightening and squeezing him, her juices seeping out of her, her orgasm driving Dylan over the edge.
Both were panting and moaning in the wake of their shared orgasms while Dylan hold onto her clit with all his strength, fighting against being sucked further in by her hungry pussy.

Finally the orgasm of both subsided, Carol leaning back on the bed and Dylan still stuck between her moist pussy lips, looking up to her clit he was still held onto and tried his best not to think about his penis starting to get hard again and that his feet now didn't reach all the way to her cervix a suddenly she groaned slightly and everything of her around Dylan grew a little bit, though not by much. Dylan doubted he would have even noticed if he weren't at his current size, but still a bit from his perspective and her walls tightened around him as Carol leaned forward and looked down at him between her breasts.

"Hey. Since you're so... little down there, did i by chance grow a bit?"

"Yes, you did!" Dylan shouted, causing Carol to giggle.

"Hihi...Sorry Dylan but you squeaky voice is just too adorable. Just as much as the way you hold on my clit... trying to look past it and my massive tits just to look at my face all the way up, up here... while you are stuck in my snatch... adorable and oh so hot..."

She reached down with her hand, her giant pointer and index finger flanking pussy and by extension Dylan.

"By the way, you should be now just two millimeter bellow of 12 centimeter. You're as small as a permanent marker and i should get you completely inside of me..."

Dylan's eyes widened in shock as she lifted her fingers and placed them on his head.

"WAIT! PLEASE WAIT! Can't we talk about it?"

"Hmmm... okay, let's talk," Carol replied, still keeping her fingers on his head.
"I really want you inside of me. And you, my dear shrunken stepbrother, are far to small to stop me. So you don't have really any say in the matter. Buuuut i guess i can grant you a little bit of control over your situation..."

Dylan looked up with a bit of hope to Carols smirking face as.

"I'll let you out after i came. So make sure you wiggle as much as you can. Oh and try to hit my g spot again. Who knows, maybe you manage to get me off before you cum yourself and shrink again."

With that she pushed him in. It was tight, hot, dark and humid, the only light coming from the entrance where her two fingers holding him in his place blocked the path. Her walls kept squeezing his body and most importantly his hard member and he realized that he really had no way to get out except to give her what she wanted so he started to wiggle his body, rub her walls with his hands, kicking and doing everything to stimulate her while avoiding to move his cock as much as he could to avoid that the friction would make him cum. But try as he might he just didn't seem to find her most sensitive spot inside her until...

"Oh Dylaaaan," he heard his stepsister's muffled voice.
"I just wanted you to know that you are doing a good job but you are not hitting a certain point. And that despite the fact that i keep you in the right spot and that i can feel something of you "poking" it...

He stopped in shock. She did not... could not...
But then he realized that, of course, she could and that she most definitively would do that and he trusted his hip upwards, rubbing the tip of his penis over the flesh trapping him, sending jolts of pleasure through his body causing Carol's giggle to vibrate trough her body.

"Bingo. Come on, keep going. I know deep down you want to..."

"Fuck..." Dylan muttered and started to thrust his hips again, humping her g spot, causing Carols moaning surrounding him and driving himself to the edge again until his seed exploded over the fleshy walls and he started to get smaller again as her finger pinched his torso between them.

"Don't worry," he heard her muffled words.
"I'll keep you in the right place. Just keep doing what you have to..."

Realizing that his penis wouldn't even get soft this time, he did as she told him and he kept fucking her g spot despite the tip of his cock being sensitive as hell after he just came, driving him crazy while her moans got louder and more frantic, building her own climax but just as she was on the verge he couldn't hold his next orgasm back, causing her to whine as his form was dwindling even more.

"AGAIN? I'M SO CLOSE!" her voice now sounded not just muffled by her flesh but thunderous as her fingers slid under his shrunken body and pressed him against her walls, rubbing him along her flesh, making him swallow her juices until she bucked her hips in the air screaming with pleasure, pressing Dylan against her g spot while her cum roared past him like tsunami that would have swept him away if she hadn't pinned him and he came again, shrinking stuck on her finger as she carefully pulled him out and lifting him up, where he truly realized how small he became as he looked at her face as large as a basketball field.

"YOU PLEASED ME."

Her voice booming despite the fact that she was just talking normally and for Dylan's sake, she started to whisper.

"You are 1.4 centimeter now. Which means you go past the centimeter mark with your next orgasm. And i have to clean you before i give you your reward for your hard work."

Before he could question what she meant, Carol opened her mouth and licked him from her finger into her mouth and trapped him in darkness before she started licking him like a candy, making satisfied noises as she tossed him around with her tongue, coating him in saliva until he came again.

She waited until he finished shrinking before she carefully spit him in her hand, looking down on his tiny form with her amber eyes.

"Just above seven millimeter..." she whispered as he stared in aw at her colossal face, taking in every detail.
"I would actually ask you which part of my body i should use to shrink you the last few times but you are too small for me to hear you now and we don't have to many safe options anyways. If i put you in my mouth, i risk swallowing you. In my pussy or on my clit, i might loose you. Heck, you might even get lost in between my pubic when you shrink all the way down, despite me keeping them trimmed. I could squeeze you between my newly gained tits but they are so big i might just squish you when you get smaller, even with your enhanced durability."

She smirked.

"But then i remembered that you wished for two things. One, to shrink until my clit dwarfs you. Goal accomplished. And two to become a speck on my nipple. And that's a wonderful idea. You can go wild, fucking my nipple and i have a spot to look out for you. So, let's do that."

With that she picked Dylan up with the tip of her finger and placed him on the top of her erect nipple, while leaning back and let him adjust to his new surrounding.

Dylan on the other hand was in a daze. Not even a few hours before he was looking down on Carol and now he was small enough to stand on her nipple, Seeing her giant face looking down on him in one direction and the landscape of her body and legs stretching into the distance on the other. At least the part of her body that was not obstructed form his view by the slope of her breast. Honestly if he wasn't turned on already he would be now.

He once read Gulliver's Travels and remembered now how the author described the presence of the Brobdingnagian giants as unattractive because one could see every imperfection on them you would normally not see.

And looking around the rough surface of Carol's nipple, Dylan decided that the Author was an idiot. Because the imperfections just made everything more exciting, gave a greater sense of scale and adventure. Every pore, every nook an cranny, every fold of her labia and bump of her nipple, every tiny hair as well the heat radiating from her skin was part of Carol's newly gained body and only shrunken down like this could Dylan appreciate every bit.

And he would appreciate it even more, because if Carol was correct he could get much, much smaller.
So he fell to his knees, kissing and worshiping the nipple while stroking his cock, which he realized Carol probably would barely able to see now, even though it was massive from Dylan's perspective and he came, shrinking down. Down to roughly three and a half millimeter under the gaze of Carol's amber eyes.

No... more like 3.6 millimeter.
He wasn't sure why but in his haze of lust he more and more lost the feeling how big Carol was to him but gained a better feel for his own size the smaller he became.

Smaller... tiny... insignificant... a insect on a goddesses nipple...

Movement to his side caught his attention and he saw her giant hand grab her other breast and massage and squeeze it, moving what appeared to Dylan like a mountain without any thought, a massive avalanche of tit flesh moving back and forth just at her whim for the sake of her lust, way faster than anything of this size had any right to be, the tremors of that movement even shaking the breast, the nipple he was on, sending him tumbling on his ass as another impact shook said nipple and he realized that she kept the nipple steady pinched between two fingers which tips were several of Dylan's own size and he had a epiphany.

She wasn't moving her tit too fast, it was just his pathetic size that made it seem like that because it he wasn't meant to be so... less.

He wasn't an insect. Insect had the chance to get away, to avoid Carol. He was less than an insect for her.

He could only pray that she would restore his size at the end because there was no obligation for a goddess to keep her word for a pathetic being like him.

And she was a true goddess now, because he was completely at her mercy no matter what he did.

She didn't restrain him because he could not run from her.
She could snuff out his life without a thought because he was so much less than her.
She only helped him because it served her.

And so sitting on her nipple, legs spread and raging boner pointing upwards he looked at the amber stars that were her eyes in the far distance, fixated on the nipple on him, feeling er hot breath like gusts of wind on a hot summer day, he realized that he couldn't help himself.

He started to worship her. The only way he knew she wanted him to do so.
He got on his knees, facing her eyes, leaned forward to touch the surface of her nipple with his forehead and kissed the bumpy skin carefully, missing how the amber pools widened for a moment before he leaned back and started to stroke his cock as he noticed ho her hand let go of the other tit and moved down her body.

Dylan didn't need to look where the hand was heading but he could swear he saw some white liquid flow from the other nipple as he continued to stroke his shaft, feeling the rhythmic vibrations as she started to finger her pussy and low pitched moans were filling the air and finally he came, shrinking further down until he was 1.8 millimeter small, his cum and size offered to Carol on the altar that is her nipple and panting he was on all for, his hard cock still refusing to become soft and as he was recovering he noticed small holes in the skin of Carol's nipple just big enough that he could put his dick inside if he pulled the skin of the opening apart a bit and some white fluid was slowly filling the hole.

"She's lactating!" Dylan realized and another realization hit him. At his current size he could barely fit his cock inside and even then it would be painful. But with her milk acting as lubricant...

Carefully Dylan enters his cock int Carol's pore. At first it goes slow, feeling unpleasant. But as soon his cock dipped in her milk and moisturized by it it slips in and out easily and Dylan starts thrusting his hips and starting to fuck Carol's giant nipple to the rhythm of her masturbation until he cums and shrinks down to 0.9 millimeter.

Dylan recover and and he notice his cock still in her milk duct and while not being so tight any more is still able to stimulate his penis so he started to thrust his hips again as a giant shadow fell over him and Carol's finger finger pressed down on her nipple, pressing Dylan down into it, the pressure causing him to cum and shrink down to 0.4 millimeter, the hole of her milk duct expanding under him.

For a second the pressure of Carol's finger seem to lessen and Dylan was hoping she would releasing him but instead she started to rub her nipple, rolling his minuscule body between her finger and her nipple, increasing her efforts to please her pussy with her other hand, loudly moaning and arching her back.

Dylan himself found himself in a state of desperation and arousal as he was violently over her nipple, the pressure of her finger pressing down on him, the vibration of her masturbation and moaning shaking him to his core.
She wasn't torturing him on purpose, he realized.
She wasn't torturing on accident either.
In fact she wasn't torturing at all.

She was simply pleasuring herself and Dylan was just collateral, no less then collateral.
He was too small, to pathetic to matter. Maybe he wouldn't even a afterthought and the realization caused him to cum and shrink down to 0,2 millimeter while he still got rolled over the skin of her nipple until she stopped rubbing her nipple and just press her finger down on Dylan while she bucked her hips as she came closer and closer to climax, trapping Dylan in a forming pool of her milk seeping from her milk duct he was pressed on as if she wanted to force him inside her tit.

Dylan swallowed as much of her milk as he felt his next orgasm forming, fully aware that it would shrink him small enough to be slip into her milk duct right under his torso as suddenly Carol cried out as she came and her orgasm rocked her body. She pressed down harder on her nipple putting more pressure on Dylan's body, who came and shrank as he was forced into her milk duct and he lost consciousness.

Dylan woke up, swimming in a lake of white liquid, a bright light shining down on him from somewhere. Looking around saw the lake surrounded by transparent walls, which were at least several hundred of meter high and he realized that he had no problem to float on the surface of the strange liquid and he carefully drink a little bit only to realize that it was milk and everything came back to him.

BOOM

Dylan turned around and saw on the other side of the lake, far behind the wall, a massive amber colored ring with a giant black hole in the middle. Dylan's cock started to get hard as he realized it was Carol's eye looking on his insignificant body swimming in her breast milk and he started to rub his penis imagine what the rest of her he couldn't see would look like from his minuscule size.


Carol on her part smiled and adjusted her glasses as she saw the tiny little speck swimming in the petri dish moving, confirming the scanners readings that her stepbrother was awake.

"Sorry Dylan," she whispered.
"You stopped shrinking but you'll be stuck for some time there. I said i can reverse the shrinking but i forgot to mention that it will take more time to do so the smaller you get. I should get you to your original size before Dad and Jennifer come back though. Until then i better leave you here in the petri dish. My milk should be enough to keep you fed."

She stopped leaning and stretched her back, her new F-Cups stretching the fabric of Dylan's shirt she borrowed along with his shorts since now none of her clothes fit her anymore.
The only part she thought was inconvenient about her enhanced body.

She took the a data pad and read the results she got from scanning Dylan's cum earlier. Especially one data she got from it that would be the basis for her next project.

Leaning back down to the petri dish and watching the tiny visible speck she imagined what she could do when she developed her own method of shrinking him whenever she wanted.

She had to wait until Dylan was big enough again for them to talk to each other but they would talk about it.

And more importantly they would talk about the change of his behavior when he was on her nipple.

Her hand glided under the waistband of the shorts toward her pussy and she started to rub her clit as she fantasized how that tiny, insignificant, barely visible speck that was her stepbrother was swimming in her breast milk, staring up at her colossal body and worship her.

Stroking his cock while praying to her, singing her praises and cumming only for her.