The summer air hung thick and sweet in the old family house, the kind of heat that made clothes cling like a second skin. At twenty-four, Lena had come home from college for the last time before starting her real life, and her brother Marcus, twenty-six and already working construction, was the only other soul rattling around the place now that their parents were on their annual cruise.
They had always been close, too close some might say, sharing secrets and late-night talks that stretched until dawn. But this summer something had shifted. The glances lingered. The accidental brushes of skin turned electric. One humid evening, after too many beers on the back porch, Marcus looked at her across the table and said it plain.
"I can't stop thinking about you, Lena. Not like a sister should be thought about."
Her pulse jumped. She felt the words settle low in her belly, warm and dangerous. "Then don't stop," she answered, voice low.
They didn't make it to the bedroom. Marcus pulled her against the kitchen counter, his mouth claiming hers in a kiss that tasted like salt and beer and years of held-back want. His hands roamed under her thin tank top, cupping her breasts, thumbs circling nipples that tightened instantly. Lena moaned into his mouth, grinding against the hard ridge already straining his jeans.
"God, your tits feel perfect," he muttered, yanking the top over her head. He bent to suck one nipple deep, tongue flicking, teeth grazing just enough to make her gasp. Lena's fingers tangled in his hair, holding him there while her other hand fumbled with his zipper. She freed his cock, thick and hot in her palm, stroking from base to tip, feeling it twitch.
Marcus growled, spinning her around so her ass pressed back against him. He shoved her shorts and panties down in one rough motion. "Been dreaming of this pussy," he said, fingers sliding between her folds, finding her already slick. Two fingers pushed inside, curling, pumping while his thumb worked her clit. Lena braced on the counter, pushing back onto his hand, the wet sounds filling the quiet kitchen.
"Fuck me," she begged. "Right here. Don't make me wait."
He didn't. Marcus lined up and thrust in deep on the first stroke, burying himself to the hilt. Lena cried out, the stretch perfect, the forbidden thrill making her clench around him. He fucked her hard, hips snapping, one hand gripping her waist, the other reaching around to rub her clit in tight circles. Sweat slicked their skin. The counter edge dug into her thighs but she didn't care; all that mattered was the slap of flesh and his low, filthy words.
"Take it, sis. This tight cunt was made for my cock."
She came first, shuddering, walls pulsing around him as pleasure crashed through her. Marcus followed seconds later, groaning as he flooded her, hot pulses deep inside. They stayed locked together, breathing hard, until he eased out and turned her to kiss her again, slower this time, tasting the sweat on her lips.
They moved to the couch after that, bodies still hungry. Lena straddled him, sinking down onto his cock once more, riding him while he sucked her nipples and gripped her ass, spreading her wider.
She leaned back, letting him watch where they joined, the sight of his shaft disappearing into her making him thrust up harder.
"Look at you," he rasped. "My little sister taking every inch like she was born for it."
Lena came again, grinding down, then slid off to take him in her mouth, tasting their mingled release. She sucked him clean, tongue swirling, until he pulled her up and bent her over the arm of the couch for another round.
By morning they had claimed every room, the taboo only sharpening each climax. They knew it would stay their secret, this summer of raw need, but neither wanted it to end. As the sun rose, Marcus pulled her close in his bed and whispered against her ear, "We're not done yet."
Lena smiled, already reaching for him again.
