Jake had his sister bent over the kitchen table before the door even clicked shut behind their parents. "You want this?" he growled, yanking her shorts down to her knees. "You want your big brother's cock stretching that tight cunt until I knock you up?"
Lila moaned and pushed back against him. "Fuck yes. I've been dripping all week thinking about it. Fill me, Jake. Breed me."
He spat on his hand, rubbed it over his thick shaft, and drove straight in. No warm-up, no teasing. Just one hard thrust that buried him balls-deep in her soaked pussy. Lila cried out, gripping the edge of the table as he started pounding. Every slap of skin was loud and wet. He grabbed her hips hard enough to leave bruises and fucked her like he meant to put a baby in her right there.
"Feel that?" he grunted, slamming in again and again.
"That's the cock that's gonna knock you up. Gonna pump so much cum in you it'll leak down your legs for days."
Lila pushed back to meet every thrust. "Do it. Come in me. I want your load. I want your kid."
Jake reached around and rubbed her swollen clit in rough circles while he hammered her. Her pussy clenched and fluttered around him, getting slicker with every stroke. He could feel her getting close. "Come on my dick, sis. Squeeze it. Milk me so I can breed that womb."
She came hard, legs shaking, a loud moan ripping out of her throat. Her cunt pulsed and gushed around his cock. Jake didn't slow down. He kept driving through her orgasm, chasing his own. When he felt his balls tighten he buried himself to the hilt and let go. Thick ropes of cum flooded her, hot and heavy, shooting straight against her cervix. He kept grinding, pushing every drop as deep as it would go.
"Fuck, take it," he snarled. "All of it. Every fucking drop."
They stayed locked like that for a long minute, breathing hard. Cum already started to leak out around his shaft. Jake pulled out slowly and watched it drip down her thighs. "Not enough," he said. "Get on the floor."
Lila dropped to her hands and knees without argument. Jake knelt behind her, spread her ass, and shoved back inside. She was even wetter now, his first load making filthy squelching sounds every time he thrust. He fucked her slower this time but just as deep, grinding his cockhead right against her womb with every stroke.
"Tell me you want my baby," he ordered.
"I want it," she gasped. "Want you to breed me. Want to be swollen with your kid. Want everyone to know my brother fucked a baby into me."
That dirty talk pushed him over again. He pulled her upright so her back was against his chest, one hand on her tit and the other on her belly while he pumped another thick load straight into her. Lila moaned and reached down to rub her clit, coming again around his pulsing cock.
They didn't stop there. He took her to the couch next, fucking her missionary so he could watch her face while he bred her. Then on the stairs, then finally in her bed where he made her ride him until his third load was packed deep inside. By the time they collapsed, sweat-slick and shaking, cum was steadily leaking from her well-used pussy.
Jake slid two fingers inside her and pushed the mess back in. "Stay like this tonight," he told her. "Keep my cum in you. Let it do its job."
Lila smiled, lazy and satisfied, and clenched around his fingers. "Already feels like it's working. My pussy's full of you."
He kissed her hard, then settled behind her, cock resting against her ass, one hand cupping her belly like he could already feel it growing. Outside, the house stayed quiet. Inside, they both knew this was only the beginning. Every night from now on would end the same way: Lila stuffed full, Jake's cum working to put his baby in her.
