Author's Note: This story was requested by Heromanbunny.
***
Amy hugged her girlfriend tight and bounced her softly. The Amazonian futa's hands coiled around Amanda's waist, fingers almost touching, and felt it as her cock rammed up her lover's luscious canal. Just like her height would imply, Amy was endowed well beyond most futanari. Her cock stretched Amanda's pussy, forcing the sopping walls tight around her like a glove made of velvet, and made its shape obvious through the otherwise flat belly. She could even make out the bell-like head.
A sharp thrust earned a high-pitched cry from Amanda. Every inch of her insides was clenched tight around Amy's length, its veins pulsating against them like a circuit of prodding fingers. The smaller futa's cock bounced with each thrust of the amazon, whose crotch clapped wetly against Amanda's balls her juices poured forth. Amanda folded in half and wrapped her mouth around an Amazonian nipple. The size was a match for a baby's fist.
Amy moved her hands down to cup her lover's ass. It filled her palms, each cheek soft and smooth, conforming to the crevices in her hands like liquid, yet they were firm beneath it all. She rocked Amanda to and fro, brushing the plush cheeks against her thighs, while Amy's cock pushed in all directions. Pre-cum splashed against the amazon's abs and ran between the crevices of her slight muscles, then down to the sheets below.
"Gonna cum... fuck, ah!" Amanda cried and arched her back, sinking her hands into the almost inhuman softness of her lover's breasts. Her cock flexed and launched a viscous rope through the air, before gravity made it fall. It splattered across Amy's face, leading down to her stomach. Another, more intense burst flew loose and coated the amazon's breasts and chin. Several more shots followed, until they weakened to a viscous dribble. Her pussy remained tense, however.
"Hmm, so tight," Amy moaned and hastened her thrusts, savouring the slick friction, "Want me to cum inside again?" She cooed, angling her hips to press her yawning urethra against Amanda's cervix.
"Oh, fuck yeah! Do it!" Amanda yelled as her body jerked in another orgasm, her cock spurting freely once more. Amy opened her mouth wide and caught several streaks. Her prick and Amanda's snatch worked in lewd harmony, their flesh slapping together. The sounds rang through their room, filling it and their ears with nothing but depravity. Amy smacked each of her lover's cheeks, smiling at how Amanda's face twisted in a mix of pain and pleasure.
"Cumming!" Amy shrieked. Her hips rose and slammed her turgid balls into Amanda's ass, shoving her cock against the smaller futa's cervix. It curved around her blunt tip, giving just enough for the dilated peak to unleash the initial deluge inside. Amy returned her hands to her lover's waist and moaned in her climax, and at the unique sensation of Amanda's belly rounding out with nothing but cum. Spurt after spurt piled into the organ.
Until the pressure was too great. Semen exploded from between them, splashing onto the bed and merging with Amanda's own seed. It all but covered Amy's torso and streamed down her legs, while more spilled. The bulge of Amanda's stomach swelled then deflated with each clench of Amy's powerful muscles. Her cock jerked and pushed out from the smaller girl's belly, the next spurt visible through her flesh.
"So good," Amanda slurred and flopped onto Amy, weakly hugging the amazon. Her head was buried between the daunting mountains of breasts, their plushness surrounded her and streaked cum across her face. Amy smiled lazily and stroked the thick seed into her lover's hair, sighing softly as the last of her orgasm dribbled out.
"I love you," Amy breathed and curled her arms around the smaller futa, "But this is kind of boring." The amazon sighed. Amanda inevitably fell asleep under the afterglow, snoring gently into the pliant mountains. There was one person who could easily solve her problem, if it could be called such. Night after night sent having fantastic sex was wonderful, but even that grew tired over time. She had a fantasy that she craved to have fulfilled.
The following day, Amy strode into the science block. She had to duck her head under the doorframe, despite how huge a place it was, easily claiming more than forty percent of the campus' huge space. Monochrome walls and floors reflected the setting sunlight brilliantly, almost blinding, while the doors sealed shut with a soft hiss and vents thrummed to keep the air inside regulated. No expenses were spared for the genius that single-handedly kept the division thriving.
And it was this genius whom Amy was there to see. She side-stepped around the students passing by, hunching her shoulders as they gawked at her height. They couldn't be blamed, standing almost two feet below her eyeline. The Amazon slid into the lab and searched around the room, sighing in relief at how empty it was.
Only one person was present amongst the rows of tables. She wore a pair of stylish glasses and a long, lab coat stained with several burn marks and holes. Stainless steel equipment lined the desks, along with beakers and utensils that Amy was unfamiliar with. Everything was meticulously organised, laid out for the next day.
"Hey, Lizzy!" Amy called softly, for her that is. She had to keep her voice under control. Lungs as large as hers could easily shake windows if she spoke loud enough, or even rupture eardrums.
"Ah, Amy! Great to see you. As big as ever I see," Eliza greeted her, rising from the stool to approach the impressive Amazon.
"Hehe, yeah," Amy shrugged, "How's the, uh, science stuff going?"
"Not bad, mostly just been passing time until I get approval for my next project," Eliza hopped back onto her seat and smirked at her friend, "So, what brings you to my humble abode?"
"I... wait, do you actually live here?"
"Perhaps."
"Why wouldn't that surprise me?" Amy chuckled, "Anyway, I wanted to ask a favour."
Eliza arched an eyebrow and picked up her tablet, fingers poised to take notes, "Ask away." The Amazon grinned and sat opposite her friend, adjusting the bulge of her crotch.
-A few weeks later-
"I can't believe she's already finished it," Amy muttered, staring at the text from Eliza on her phone 'It's done'. That was all it read. She glanced down at her girlfriend. The far smaller futa shrugged and led the way inside, smiling eagerly. Neither had thought this day would come, yet here it was. Amy lingered behind to watch her lover's bountiful ass, before following her.
"Welcome friends, welcome!" Eliza exclaimed, waving to the pair from her table, "Come, sit."
"Hey, Lizzy," Amy greeted her as they sat down.
"Is it a day off today?" Amanda inquired, glancing around at the near-empty lab.
"No, I just kicked everyone out. If this works right, then I think you will want some... privacy," Eliza winked.
"You really did it?" Amy leaned forward excitedly, eyes and mouth wide. She glanced at Amanda, who shared her grin.
"Sure did... probably," Eliza chuckled and pulled a beaker of transparent, blue fluid in front of them, "Here it is. Shrinkage! The fantastic new product that will temporarily shrink you down. Presumably, that is."
"You haven't tested it?" Amanda scowled at the scientist.
"I figured Amy would want to do the honours."
"You figured right," Amy laughed and grabbed the beaker, regarding the clear blue liquid, "How small will it make me?"
"I'd rather let you find out," Eliza clapped her hands together and stared at the Amazonian futa, tongue flicking across her lips in anticipation. The pair across from her looked to one another, sharing a keen smile.
"Ready to fuck a midget?" Amy smirked.
"Not exactly, you'll be perfectly proportionate. More like a person on a big tv," Eliza explained, "Also, that word is offensive, I'd thank you not to use it again."
"Sorry," Amy chuckled and raised the beaker to her lips. She winked at her girlfriend, then chugged the contents in one go. It slid down her gullet with ease. The flavour was soft as it washed across her tongue, reminiscent of blueberries, yet unlike them. As the last drops flowed down her throat, Amy swore she felt it settle into her stomach. She smacked her lips and set the glass down.
"How're you feeling?" Amanda inquired, casting a worried eye over Amy's body.
"Pretty good. That tasted great... I am a little warm, though," Amy mumbled and pulled at her shirt, loosening it around her breasts. She glanced at the reflective table surface, noticing that her cheeks were red, and that it seemed closer than normal. The amazon raised her hands and stared at them, watching closely for signs that Eliza's potion was working.
She flexed her fingers with a slight frown. They felt tight, as did most of her body, like something was pulling her skin. Amy felt at her arms, unintentionally taking a moment to indulge in the natural muscle tone, then patted her legs for any hint of change. Nothing physical seemed present, yet the tightness persisted and increased. Her hands found her crotch as the sensation became unbearably potent there.
Amy gasped as her normally taut jeans grew lax around her groin. The bulge dissipated to a slight protrusion, enough that she was unmistakably a futa, however it was far from the bulk that she was accustomed to. She looked up at her girlfriend with an excited smirk, which widened to flash her teeth. Amanda's face was almost level with hers and, slowly, their eyes fell onto the same plane. The amazon lunged forward and mashed her lips into the other futa's, wrapping her arms around her. Harsh moans reverberated in the back of their throats.
"It's really happening," Amy gasped when they separated, and she looked up at Amanda, a fact that made her giggle, and hopped down from her stool. Her shirt hung on one shoulder, falling from the other like a petite girl wearing an oversized footballer's jersey. The swell of her breasts was lost as well, every inch of her head-sized mounds depleted until they were diminutive curves on her chest.
