The house was quiet except for the low hum of the refrigerator and the occasional creak of old floorboards. Lena, twenty-two and home from college for the weekend, sat on the couch in her thin tank top and shorts, sipping the drink her older brother Mark had mixed for her. He was twenty-five, broad-shouldered, with that same dark hair and sharp jaw she had always secretly noticed.
Mark watched her closely from the armchair, his eyes never leaving the glass as she drained it. The powder he had stirred in was tasteless, fast-acting.
Within minutes Lena's eyelids grew heavy, her words slurring into soft giggles. She leaned back, legs parting slightly without thought. Mark stood, crossed the room, and knelt in front of her.
"You're feeling good now, aren't you, little sister?" he said, voice low and commanding. His hands slid up her bare thighs, pushing the shorts aside. Lena murmured something incoherent, her body pliant under his touch. He pulled the fabric down and off, exposing her smooth pussy already glistening from the drug's effect on her system.
Mark spread her legs wider, fingers tracing her folds before pressing two inside. She was tight, warm, and her hips twitched involuntarily. "That's it. Let me in." He worked her open slowly at first, then faster, thumb circling her clit until her breathing hitched and a weak moan escaped. Her head lolled to the side, but her body responded, wetness coating his hand.
He stood, unbuckled his jeans, and freed his thick cock. It was already hard, veins prominent. Mark gripped the base and rubbed the head against her entrance, teasing. Then he pushed in, inch by inch, stretching her drugged body around him. Lena's eyes fluttered but stayed half-closed. He bottomed out with a groan, hips flush against hers.
"Fuck, you feel perfect," he growled. He started thrusting, deep and deliberate, each stroke claiming her completely. His hands pinned her wrists above her head on the couch cushion, power flowing through the simple restraint. Lena's tits bounced with every drive of his hips; he leaned down and sucked one nipple hard through the tank top, biting just enough to mark.
The pace built. Mark fucked her harder, the wet slap of skin filling the room. He shifted her legs over his shoulders for deeper access, pounding into her cervix with controlled force. Her pussy clenched around him in involuntary spasms, drugged arousal making her drip down his balls. He reached between them and rubbed her clit in tight circles until her body arched and a broken cry left her lips.
Mark didn't stop. He flipped her onto her stomach, pulled her hips up, and slammed back inside. One hand fisted her hair, the other gripping her ass cheek hard enough to leave fingerprints. He used her like this for long minutes, every thrust a reminder of control. Sweat slicked their skin. His grunts grew rougher as he chased his release, pounding relentlessly until his cock pulsed and he flooded her with hot cum, holding deep as he emptied.
He stayed inside her afterward, breathing heavy, fingers tracing the marks he'd left. Lena remained limp and blissed out, the drug keeping her floating. Mark pulled out slowly, watching his seed leak from her used hole. He cleaned her gently with a warm cloth, then carried her to bed, laying her down and pulling the covers over them both.
In the dark he held her close, one arm possessive around her waist. She stirred faintly, murmuring his name, and he kissed the back of her neck. The night stretched on, quiet and heavy with what they had done, the power exchange lingering in every shared breath. By morning the drug would fade, but the memory and the bond would remain, dark and binding.
