Under the cover of darkness, siblings succumb to their forbidden desires. She creeps into his room, her heart pounding, and finds him awake, waiting. They don't speak, the silence heavy with anticipation. She climbs onto his bed, straddling him, her nightgown slipping off her shoulders. He reaches up, caressing her breasts, his thumbs brushing over her nipples. She grinds against his growing erection, her panties dampening. He pushes the nightgown down, exposing her, and takes a nipple into his mouth, sucking hard. She gasps, her fingers tangling in his hair. He flips her onto her back, pulling her panties aside to enter her, his thrusts deep and steady. She wraps her legs around him, meeting each thrust, their bodies slapping together in the quiet room. They come together, their moans muffled by each other's mouths, their bodies shaking with the intensity of their taboo passion.