Day 3

You woke up to the feeling of soft, warm lips wrapped around the head of your cock.

Mayu was under the sheets, her petite body between your legs, collar still fastened around her neck from last night. Her tongue swirled lazily around your morning wood as she sucked gently, eyes looking up at you with that mix of shyness and growing hunger.

“Good morning…” she mumbled around your shaft, voice still raspy from yesterday’s screaming. “I woke up empty… and wet. So I thought I’d help myself.”

She took you deeper, gagging softly as she forced more of your thick cock into her throat. Saliva dripped down your balls as she bobbed her head with sleepy determination. You gripped her hair and fucked her face for a few minutes, enjoying the wet, choking sounds before pulling her off.

Mayu gasped for air, strings of spit connecting her lips to your cock. “After breakfast… I want to show you the fucking machine.”

The anticipation made the morning drag. Mayu wore only the collar and a tiny pair of panties that were already soaked through. Every time she moved, you could see the outline of her swollen pussy lips and the dried cum still crusted on her thighs from the previous day.

As soon as the dishes were cleared, she dragged you into her room with surprising strength for someone so small.

In the corner, half-hidden behind a clothes rack, was a sturdy black fucking machine. It had a powerful motor, adjustable angle, and a thick, veiny 7-inch dildo already attached. Mayu blushed deeply as she wheeled it out into the center of the room.

“I only used it once… by myself,” she admitted. “It made me cum so hard I cried. But I want you to control it while you use me.”

She handed you the remote, then knelt on all fours on the bed, ass raised high. The collar’s ring gleamed as she looked back at you.

“Rough today… remember?” she whispered. “Break me.”

You started by cuffing her wrists together behind her back again and tying her ankles to the corners of the bed, spreading her wide. Mayu’s pussy was already dripping, puffy and red from the constant use over the last two days.

You lubed the machine’s dildo generously and lined it up with her entrance. Then you pushed the head inside her and turned the machine on low.

The mechanical sound filled the room as the thick dildo began sliding in and out of her tight cunt at a steady pace. Mayu moaned loudly, eyes fluttering.

You didn’t let her adjust.

While the machine fucked her pussy, you climbed onto the bed and shoved your cock straight into her mouth. You held her head by the collar and fucked her throat in deep, rough strokes, matching the rhythm of the machine. Mayu gagged and drooled uncontrollably, tears running down her cheeks, but she never pulled away.

You gradually increased the machine’s speed.

The wet, rapid plap-plap-plap of silicone pounding her pussy mixed with the obscene gagging sounds from her throat. Mayu’s whole body shook. You reached under her and pinched her nipples hard, then slapped her ass repeatedly, leaving red handprints on her pale skin.

When you felt her throat tighten in orgasm, you pulled out and let her scream.

“I’m cumming—! The machine is too fast– ahhh fuck—!!”

She squirted hard around the pounding dildo, clear fluid spraying onto the sheets and the machine. You didn’t turn it off. You kept it hammering her through the orgasm while you moved behind her.

You pulled the machine back slightly, lined up your cock with her tiny asshole, and pushed in.

Mayu’s scream was hoarse and broken as you forced your thick cock into her ass while the machine continued destroying her pussy. Double penetration, one real cock and one relentless mechanical one,  stretched her tiny body to its limit.

You gripped the collar like reins and fucked her ass hard, deep, and merciless. The machine’s motor whirred louder as you cranked the speed higher. Mayu could barely form words anymore. She babbled incoherently, drooling onto the pillow, eyes rolled back, body jerking violently with every thrust.

You used her like this for nearly an hour,  switching holes, making the machine fuck her ass while you railed her pussy, then back again. You came once deep inside her ass, then kept going. The second time you pulled out and painted her back and collar with thick ropes of cum.

By the time you finally turned the machine off, Mayu was a wrecked, sobbing, twitching mess.

Her holes were gaping,  red, swollen, and leaking cum. Her thighs trembled uncontrollably. Tears and drool soaked the pillow. The collar was wet with sweat and spit.

You uncuffed her and gently laid her on her back. Mayu could barely move. She looked up at you with glassy, fucked-out eyes and a weak, blissful smile.

“I… I think you actually broke me this time…” she rasped, voice almost gone. “My pussy and ass… they’re throbbing so much…”

She reached down shakily and touched her ruined holes, then brought her cum-covered fingers to her mouth and licked them clean.

After a long silence, she whispered:

“Tomorrow… I want something even crazier.”

She paused, biting her swollen lip, clearly embarrassed but too turned on to stop herself.

“I want you to film me. Not TikTok… Real videos. Record everything you do to me. Make me watch them later while you fuck me again. I want to see how much of a slutty little toy I become for my step-brother…”

Mayu’s cheeks burned crimson, but her eyes sparkled with filthy excitement.

“Think you can do that tomorrow? Record your shy step-sister getting completely ruined?”

She pulled you down for a tired, sloppy kiss, then curled up against you, already half-asleep despite the bright afternoon light.

“I don’t want to be able to walk properly by the time our parents come home…”