Note: This story was written with assistance by an AI. I provided prompts and edited the results to make sense, creating something resembling a full story.

The barn had changed. Dust still clung to the rafters, tools still scattered across benches, but every night it became less a workshop and more a laboratory of pleasure and control.

Peridot had made it routine: the tablet glowing with notes, the ropes ready by the crate, her “Phalliform Penetrator” humming faintly on standby. And Lapis—once proud, aloof, untouchable—now knelt at her command without even being told, wrists out, wings tucked submissively, eyes lowered.

“Good subject,” Peridot cooed, fastening the rope around her wrists. “Phase Three: ritual conditioning. We’ll test your ability to anticipate humiliation before it happens.”

Lapis swallowed, her voice raw but obedient. “Yes… Peridot.”

Peridot set the synthetic cock to a low hum, sliding it along the inside of Lapis’s thigh without pushing in yet. She savored the way her subject twitched, thighs trembling. “Repeat it,” she ordered.

“I’m your slut,” Lapis whispered.

“Again.”

“I’m your dirty, worthless slut,” she whimpered louder, body arching into the teasing vibration.

Peridot grinned, stylus scribbling furiously on the tablet. “Excellent progress. Response time has halved since last trial. Truly, you’re adapting to your purpose.”

She pushed the tip inside, savoring Lapis’s scream, when the barn door banged open.

Both of them froze.

“Hey, Peri, you in—whoa.”

Amethyst stood in the doorway, her wide eyes taking in everything: Lapis bound and trembling, the humming device between her thighs, Peridot perched over her like a mad scientist, face flushed, grin feral.

For a split second, the silence was unbearable. Then Amethyst smirked. “Holy shit. Didn’t know you two were freaks.”

Peridot’s circuits buzzed with panic and exhilaration all at once. She hadn’t planned for interference—but experiments demanded improvisation.

“Amethyst!” she barked, hopping off Lapis but keeping the device buried in place, making her moan. “Perfect timing. You’ll assist with data collection.”

Amethyst blinked, then barked a laugh. “Assist? What, like a lab partner?”

“Yes!” Peridot snapped, shoving the tablet into her hands. “Record everything. Angle, volume, confession rate. This is important research.”

Amethyst flipped the tablet upright, eyes gleaming with mischief. “Ohhh, I can get behind this.” She swaggered inside, squatting next to the bound Lapis. “Damn, never thought I’d see waterworks like this outside a fight.”

Lapis moaned, face red, but Peridot silenced her with a tug of her hair. “Don’t be shy, subject. Show her how well-trained you are. Tell her what you are.”

Lapis shook, shame and lust mixing in her eyes. “I’m… Peridot’s slut.”

Amethyst’s grin spread wide. “Hah! No way. Little green’s got you wrapped around her stubby fingers, huh?”

“Stubby?!” Peridot shrieked, then immediately turned it into a smug grin. “Stubby genius, thank you very much. Now keep recording.”

Amethyst laughed so hard she nearly dropped the tablet, but she didn’t stop watching, eyes flicking hungrily between them.

Peridot turned back to her trembling subject, twisting the dial on the phallus until it buzzed louder, harder. “Come on, Lapis. Louder. Tell Amethyst everything.”

“I’m her dirty toy,” Lapis sobbed, body jerking. “I’m nothing without her—I’m just her slut!”

Amethyst whistled low, licking her lips. “Shit. She’s gone, huh? You really broke her.”

“Conditioned her,” Peridot corrected, rocking the shaft inside faster. She looked over her shoulder, eyes gleaming. “And you, Amethyst—you’re next.”

Amethyst’s smirk faltered, her eyes widening just slightly.

Peridot laughed, manic and triumphant, over the sound of Lapis’s screams and the vibrating hum of her invention. “Yes. Every one of you. One by one. And you just volunteered.”

Amethyst licked her lips slowly, eyes narrowing as she set the tablet down. “Guess I’ll stick around, then. See what all the fuss is about.”

Peridot’s grin sharpened. The experiment had just doubled.

The barn door shut with a heavy thunk, Amethyst leaning back against it, arms folded, grin plastered across her face like she’d just stumbled into the juiciest secret in Beach City. Lapis was bound, trembling on the floorboards, moaning around the thick hum of Peridot’s invention as it worked inside her. And Peridot—tiny, manic, in total command—turned to her new audience like a ringmaster introducing the star attraction.

“Observation trial,” she announced breathlessly, tugging Lapis’s hair until her flushed face tilted up toward Amethyst. “Subject will perform for our guest. Full compliance required.”

Lapis’s eyes flicked to Amethyst—shame, humiliation, desperation all swirling in her gaze. She shook her head faintly, a whimper caught in her throat.

Peridot’s grin widened. “Don’t be shy. Show her.” She cranked the dial higher, the shaft inside Lapis buzzing so loudly the floorboards seemed to vibrate. Lapis cried out, back arching, tears streaking her cheeks.

“Tell her what you are,” Peridot ordered.

Lapis sobbed, voice breaking. “I’m… Peridot’s slut!”

Amethyst’s grin stretched wider, her tongue swiping across her teeth. “Damn. Didn’t think Blueberry had it in her.”

Peridot cackled. “She has everything in her, now.” She pressed her palm flat against Lapis’s stomach, feeling the tremors, the tightening. “Again! Louder! Let her hear it!”

“I’m your dirty slut!” Lapis screamed, voice cracking, body convulsing around the device.

Peridot yanked her head back further, making her moan through clenched teeth. “And?”

“I’m your worthless toy! Your—fuck—your property!”

Amethyst barked a laugh, low and wicked. “Shit, Peri, you’ve wrecked her.” She squatted closer, watching Lapis squirm, eyes gleaming with curiosity. “Never seen her like this before. Kind of hot, not gonna lie.”

Peridot’s chest swelled with smug pride. She leaned low, whispering venom into Lapis’s ear. “Beg for her. Show her how deep you’ve sunk.”

Lapis thrashed, eyes wild, before crying out toward Amethyst, “Please! Please watch me! I’m her slut, I’m nothing without her—please!”

The barn rang with her desperate confessions, the synthetic shaft buzzing furiously, her slick gushing over the boards. Peridot laughed triumphantly, clutching her tablet close even as she thrust harder, faster, until Lapis shattered again, screaming so loud it rattled the windows.

When the device finally went still and Peridot pulled it free, strings of slick dripping to the floor, Lapis collapsed, limp and wrecked, mumbling broken admissions into the wood: “Yours… always yours… nothing but yours…”

Peridot climbed up onto her back like a conqueror planting her flag, grinning down at Amethyst. “Proof. Indisputable. Total conditioning achieved.”

Amethyst’s smirk had softened into something hungrier, eyes flicking between Peridot’s flushed, triumphant face and Lapis’s ruined body. She licked her lips, chuckled low. “Guess you’re not just all bark, huh, Peri?”

Peridot pointed the still-dripping invention at her like a weapon. “You’re next.”

Amethyst raised her hands in mock surrender, grin curling wickedly. “Heh. Might not even fight you on that one.”

Peridot’s pulse throbbed, her whole body buzzing hotter than her invention. The experiment was expanding. And she was ready.

Amethyst would make a habit of returning to the barn each night to see what experiments Peridot would conduct.

Night One – The Crawl

The barn smelled of sweat and rope. Amethyst lounged on a hay bale, arms behind her head, watching as Peridot tugged Lapis along the floor by a leash clipped to a collar around her neck.

“Say it with every step,” Peridot barked, yanking the chain.

“I’m your slut,” Lapis panted, knees scraping the boards. “I’m your slut, I’m your slut—”

Amethyst laughed so hard she nearly fell off the bale. “Holy shit. You really got her crawling for you.”

Peridot smirked, yanking harder until Lapis collapsed face-first against her boots. “Correction: groveling.”

Amethyst’s laughter softened into a hungry grin. She stayed longer than she’d meant to.

Night Two – The Display

Peridot had Lapis bound to a post, arms overhead, her chest and thighs smeared with glowing streaks of light paint. Peridot used her stylus like a whip, tracing humiliating words across her body: slut, toy, bitch.

Amethyst whistled low, biting her lip. “Damn. That’s messed up… but kinda hot.”

“Scientific labeling!” Peridot snapped, smacking the stylus across Lapis’s nipple, making her cry out. “Say what you are, subject.”

“I’m your labeled slut,” Lapis sobbed, thighs trembling.

Amethyst leaned forward, grin curling. “You’re a real mad scientist, Peri.”

Peridot’s grin was feral. “And she’s my proof.”

Night Three – The Feast

The hammock swung wildly as Lapis lay spread open, Peridot perched between her thighs, tongue working ruthlessly. Lapis’s cries filled the barn, her hands bound above her head.

Amethyst slouched in the doorway, arms folded, but her grin faltered. She was breathing heavier now, shifting on her feet.

Peridot pulled back, chin slick, smirking up at her audience. “Pay attention, Amethyst. This is how you break a Gem.” She slapped Lapis’s thigh, making her whine. “Tell her.”

“I’m broken,” Lapis gasped, voice raw. “She broke me—she owns me—”

Amethyst licked her lips, her eyes dark. She didn’t laugh this time.

Night Four – The Foot Ritual

Peridot had Lapis kneeling at her feet, sucking each toe reverently while Peridot scribbled notes on her tablet.

Amethyst leaned against the wall, trying to look unimpressed, but her hand strayed toward her tights more than once.

“Confess,” Peridot ordered.

Lapis pulled off with a wet gasp. “I’m your foot worshipper—your worthless little puddle slut—”

Peridot shoved her back down, grinding her toes into her mouth. “Louder!”

Amethyst shifted uncomfortably, thighs pressing together, grin faltering.

Peridot caught the glance. She smirked. The trap was working.

Night Five – The Pivot

Amethyst didn’t even pretend she was just “dropping by” anymore. She strode in, plopped down cross-legged, and grinned lazily as if she owned the place.

Tonight, Lapis was bent over a crate, the synthetic cock humming inside her, Peridot tugging her hair back to make her moan toward the audience.

Amethyst leaned forward, elbows on her knees, eyes fixed. “Stars… she’s really begging for it now.”

Peridot glanced over her shoulder, glasses glinting. “Do you want to know why?”

Amethyst raised a brow, intrigued. “Why?”

Peridot jerked Lapis’s head back harder, making her cry out, spit dripping down her chin. “Because she knows she belongs to me. And she wants you to know it too. Don’t you, subject?”

“Yes!” Lapis screamed, voice breaking. “I belong to her—I’m her slut—I want you to see me ruined—please—!”

Amethyst’s grin split wider, her pupils blown dark. She dragged her teeth across her lip, muttering, “Fuck, that’s hot.”

Peridot smirked, triumphant, twisting the phallus until Lapis shrieked. Then she leveled her gaze on Amethyst, sharp and cutting.

“You’re next,” she said simply.

And this time, Amethyst didn’t laugh. She leaned back, smirk curling slow, and said, “Maybe I am.”

The next night, the barn was already prepped: ropes hanging from rafters, the crate cleared off, the floor swept so there’d be nothing to get under bare knees. Peridot had done it all without a word, the same calm, clinical energy she used when she built a new drone — only tonight the drone was flesh.

Lapis was already trussed up against a support beam, arms overhead, wings pinned in a makeshift harness that forced her to stay still. She wasn’t gagged; she could whimper, whisper, and moan — and Peridot wanted her to. Wanted her to see every second of what was about to happen.

Amethyst came through the door like she always did, swagger in her shoulders, but she didn’t go for a hay bale. She stood right in the middle of the room, eyes flicking from Lapis’s bound form to the humming toys lined up on the crate. A slow smile spread across her face.

“So,” she drawled, “this is my turn?”

Peridot’s eyes glittered behind her visor. She held up a new version of her synthetic cock — sleeker, glowing brighter. “Version two,” she said simply. “For more… durable subjects.”

Amethyst’s smirk widened. “You sure you can handle me, Peri?”

Peridot closed the distance, tiny but fierce, tilting her head back to glare up at her. “Question is whether you can handle me.” She dropped the device onto the crate with a satisfying thunk and pointed at the floor. “Strip, then kneel.”

Amethyst hesitated only a heartbeat before sinking to her knees. Her grin stayed, as her clothing disappeared, but there was a new tension in her shoulders.

Peridot circled her like a predator, fingers skimming her purple skin, tugging at her hair. “Hands behind your back.”

Amethyst complied. Lapis whimpered softly from her post, the sound of a witness who couldn’t look away.

Peridot smirked and began winding a rope around Amethyst’s wrists, quick, efficient loops. She tugged it tight, making the bigger Gem grunt. “Comfortable?” she asked sweetly.

“Yeah,” Amethyst rasped. “Do your worst, scientist.”

Peridot’s grin turned sharp. She reached for the cock, flicked a dial, and it hummed with a deep, throaty vibration. She trailed it along Amethyst’s collarbone, down between her breasts, over the soft slope of her belly, not pushing in anywhere yet. “Test One,” she murmured, eyes glinting. “Compliance under restraint.”

She pressed the tip between Amethyst’s thighs and rolled it slowly upward. Amethyst hissed, hips jerking. “Shit…”

Peridot leaned close, voice low. “Tell Lapis what you are.”

Amethyst opened her mouth, ready with a joke, but Peridot twisted the dial and the hum deepened; Amethyst gasped, eyes fluttering. “I… I’m your test subject.”

“Again,” Peridot snapped, pressing harder.

“I’m your subject,” Amethyst groaned. “Your… your toy.”

Lapis whimpered at the words, pulling against her bonds, but Peridot didn’t look at her. All her attention stayed on Amethyst, the way her bravado cracked under the pulsing hum.

Peridot dragged the tip back, slicking it against her with deliberate, torturous slowness. “Test Two: verbal degradation combined with stimulation.” She bent close, whispering in her ear. “Say you’re next. Say you’re going to be my slut like her.”

Amethyst’s chest rose and fell fast. “I’m next,” she panted. “I’m gonna be your slut…”

Peridot smirked and shoved the tip inside with a single, precise thrust. Amethyst cried out, her hips jerking forward against the ropes. Peridot moaned softly at the sight, eyes fever-bright.

She thrust it in and out in slow, grinding strokes, watching the big Gem shudder, her smirk finally breaking into open-mouthed moans. “Good girl,” Peridot hissed. “Look at her, Lapis. Look at your replacement learning her place.”

Lapis let out a choked noise, eyes wide.

Peridot twisted the dial higher. The cock buzzed and pulsed, filling Amethyst completely. She leaned back enough to watch her subject’s face as she pumped harder, relentless. “Say it again. Say you’re mine.”

“I’m yours,” Amethyst moaned, voice cracking. “I’m yours, Peri—shit—”

“Say it like her,” Peridot barked, smacking her thigh. “Say you’re my dirty slut.”

“I’m your dirty slut!” Amethyst screamed, body arching.

Peridot laughed, riding the moment, pressing the cock deeper, faster, until Amethyst was trembling, hips thrusting back into it, her usual cocky grin gone, replaced with desperate whines. “That’s it. Break for me. Come undone for me. Show her.”

Amethyst’s head fell back, a guttural sound tearing from her throat as she climaxed hard around the device, shaking under Peridot’s hands. Peridot slowed the thrusts but didn’t pull out yet, savoring the aftershocks, the sight of the mighty Gem quivering on her knees.

When she finally withdrew, slick dripping from the glowing tip, she gripped Amethyst’s chin and tilted her face up. “Look at her, Lapis,” she murmured, voice hoarse. “Another subject conditioned. You’re not alone anymore.”

Amethyst panted, still on her knees, rope biting her wrists, eyes dazed but shining. “Stars… you’re something else, Peri…”

Peridot stood over her, cock in one hand, tablet in the other, a little green tyrant drunk on power. She turned to Lapis, still bound and watching, and smiled sharp enough to cut glass. “Phase Four begins tomorrow. Two subjects. Double the data.”

Lapis shivered, Amethyst grinned weakly, and Peridot’s glasses glinted in the low barn light.

The experiment was working better than she’d dreamed.