Emma was 22 years old, with a tight athletic body, perky C-cup tits, and a round ass that looked incredible in yoga pants. She had always been the “good girl” in the family — until today.
She was home alone in her apartment, feeling horny and bored. On a whim, she bought a pair of pink metal handcuffs online. She wanted to try something kinky. She stripped down to a tiny black lace bra and matching thong, cuffed one wrist to the headboard, and posed in front of the mirror.
It was supposed to be just practice.
Then she dropped the key.
It slid under the bed, completely out of reach.
“Fuck…” Emma whispered, yanking on the cuff. Her wrist was already red. She was stuck.
She had two choices: call the landlord (old Mr. Jenkins) or call her older brother Cooper.
Cooper was 26, tall, muscular, and stupidly hot. He lived in the apartment right above her and had a spare key. But calling him meant he would see her almost naked and handcuffed to the bed like a desperate slut.
Emma’s pussy throbbed at the thought.
After twenty minutes of struggling, she gave in and called him.
Cooper picked up on the second ring. “Hey sis, what’s up?”
“Cooper… I need you to come down here right now. I… I did something stupid and I’m stuck.”
His voice changed immediately. “Are you okay? I’ll be right there.”
A few minutes later, she heard the front door open.
“Emma?” he called out.
“In the bedroom,” she answered, her voice small.
Cooper walked in and froze in the doorway.
His little sister was handcuffed to the headboard, wearing nothing but a tiny black lace bra and thong. Her legs were slightly spread, and her face was bright red with embarrassment.
“Jesus Christ, Emma…” he breathed, eyes roaming over her body.
“I dropped the key under the bed,” she whispered. “Please just unlock me.”
Cooper didn’t move to get the key. Instead, he slowly walked closer, his eyes dark with lust.
“You were playing with handcuffs… dressed like this?” he asked, his voice low and rough.
Emma bit her lip. “I was just… trying them on.”
Cooper smirked. “Bullshit. You were fantasizing about someone cuffing you and fucking you senseless, weren’t you?”
Emma’s pussy clenched. She didn’t answer.
Cooper knelt down, found the key, but didn’t use it. Instead, he sat on the edge of the bed and ran his hand slowly up her bare thigh.
“Cooper… what are you doing?” Emma whispered, but her voice was shaking with arousal.
“I’ve wanted to fuck you for years, little sis,” he said bluntly. “And now you’re tied up like a gift for me.”
He leaned down and kissed her hard. Emma moaned into his mouth as her brother’s tongue invaded her. His hand slid between her legs and rubbed her soaked thong.
“Fuck, you’re dripping,” he growled.
He ripped the thong off her body and buried his face between her thighs. Emma cried out as her big brother licked and sucked her pussy like a starving man. He shoved two thick fingers inside her and finger-fucked her while devouring her clit.
Emma came hard, screaming his name, her body shaking violently.
Cooper stood up, pulled off his shirt, and dropped his pants. His cock was huge — thick, veiny, and rock hard.
He climbed on top of her, rubbed the fat head of his cock up and down her slit, and then slammed into her in one brutal thrust.
“Fuuuuck!” Emma screamed as her brother’s big cock stretched her tight pussy.
Cooper fucked her like an animal — hard, deep, and relentless. The headboard banged against the wall as he pounded his little sister’s cunt.
“You like your brother’s cock, slut?” he growled.
“Yes! God yes! Fuck me harder, Cooper!”
He fucked her through two more orgasms before pulling out and shoving his cock down her throat. Emma gagged and drooled as he face-fucked her.
Then he uncuffed her, flipped her onto all fours, and fucked her doggy style, slapping her ass red while calling her his dirty little sister slut.
He finally exploded, pumping rope after rope of thick cum deep into her womb. Over the next several months, Emma and Cooper became addicted to each other.
They fucked constantly:
- In her apartment
- In his apartment
- In the laundry room
- In his car in the parking garage
- Even once in their parents’ house while visiting for the holidays (risky and extremely hot)
Cooper became rougher and dirtier with her. He loved choking her while pounding her pussy, making her call him “Big Brother” while she came, and filling her with load after load of cum.
Emma started begging for it. She loved being her brother’s secret fucktoy. She started wearing skirts with no panties so he could bend her over and fuck her whenever he wanted.
One night, Cooper fucked her raw in her bed while their parents were asleep down the hall. He covered her mouth as he came deep inside her again. They both knew it was wrong. They both knew they couldn’t stop. And neither of them wanted to.
Two months later, Emma took a pregnancy test.
It was positive.
She ran upstairs to Cooper’s apartment, tears in her eyes, and showed him the test.
“I’m pregnant… with my brother’s baby.”
Cooper’s cock instantly got rock hard. He grabbed her, threw her on the couch, and fucked her harder than ever before.
“You’re carrying your big brother’s child,” he groaned as he pounded her pregnant pussy. “Such a dirty little sister.”
Emma came repeatedly, screaming in ecstasy.
As her belly grew, so did her horniness. Her tits swelled with milk. Cooper became obsessed with sucking milk from her breasts while fucking her. He would drink from one tit while pounding her pussy, then switch sides.
One night, with Emma seven months pregnant, Cooper fucked her ass while she rode a dildo in her pussy. Emma had the biggest orgasm of her life, squirting everywhere as her brother filled her ass with cum.
***
Emma gave birth to a healthy baby girl.
The moment they brought her home, Cooper was fucking his sister again — this time while she was breastfeeding. He sucked milk from one breast while slowly sliding his cock in and out of her still-sensitive pussy.
“I love you, Emma,” he whispered. “I’m never going to stop fucking my little sister.”
Emma smiled, tears of joy in her eyes.
“Good… because I want you to put another baby in me as soon as possible.”
Cooper thrust deep and came inside her again, sealing their forbidden love forever.

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