The house felt strangely quiet without their parents, the kind of silence that hummed with possibility. Elizabeth padded down the hallway in her oversized nightshirt, the fabric brushing her thighs with every step. At eighteen, she and her brother Steve had the place to themselves for the first time, and curiosity pulled her toward his room. She pushed the door open without knocking. Steve sat propped against his pillows, laptop balanced on his lap, the glow illuminating his surprised face.
"Caught you," she said, leaning against the doorframe with a smirk. "What are you watching that's got you so focused?"
Steve fumbled with the screen, cheeks flushing. "Nothing. Just... research."
Elizabeth laughed, the sound light and teasing. "Research? At this hour? Let me see." She crossed the room and climbed onto the bed beside him before he could protest, deliberately letting the nightshirt ride up. The motion revealed she wore nothing underneath, her smooth skin and the curve of her hip flashing briefly. Steve's eyes widened, but she pretended not to notice, settling close enough that their shoulders touched.
The video on screen featured a couple tangled in sheets, moans filling the room. Elizabeth tilted her head. "Interesting choice. Virgin like you, I bet this is educational."
"Hey, you're one to talk," Steve shot back, recovering with a grin. "Miss 'I've never even kissed anyone.'"
"True," she replied, her voice dropping as she shifted, letting the shirt slip higher. "But watching this with you feels... different. Horny already?"
Their eyes met, tension crackling. Steve's hand brushed her leg accidentally, then lingered. "You're making it hard to focus on the screen."
Elizabeth turned toward him, bold. "Good. Then stop focusing." She reached over, her fingers tracing his arm as the porn continued, bodies moving in rhythm on screen. Soon they were rubbing against each other, the thin barrier of his boxers and her shirt doing little to hide the growing heat. His cock pressed hard against her thigh through the fabric, and she felt herself growing wet, dripping with unexpected need.
"This is crazy," Steve muttered, but his hand slid under her shirt, cupping her ass. "We're siblings."
"And adults," Elizabeth countered, her tone sharp and playful. "Home alone. No rules tonight. Feel how wet I am?" She guided his fingers lower, gasping as they explored her pussy.
Clothes vanished quickly. Naked now, they pressed together, panting. Elizabeth wrapped her hand around his hard cock, stroking with confidence. "Ever had a blowjob?" she asked, lowering her head. She took him in her mouth, tongue swirling, while he groaned and tangled fingers in her hair.
"God, Liz, that feels..." He pulled her up, kissing her fiercely. "I want more. Do you want to do what they're doing?"
Elizabeth straddled him, strong and sure. "Yes. But I'm not on birth control."
Steve hesitated, sweat beading on his brow. "No condom either. We should stop."
She rocked against his cock, both of them dripping with desire. "We're too horny for that. Risk it. I want you inside me."
He thrust up, entering her pussy with a shared moan. They moved together, building rhythm, her ass bouncing as she rode him. "Harder," she demanded, witty even now. "Show me what that porn taught you."
Sweating and panting, they climaxed together, his cum filling her as she came around him. Collapsing in a tangle, Elizabeth smiled. "That was better than the video."
The night had only begun to reveal what else they might explore.
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