As the rain lashes against the window, the siblings huddle together for warmth, their bodies pressed close in the flickering candlelight. The brother's hands roam over his sister's curves, tracing the lines of her body with a reverence born of taboo. He cups her breasts, his thumbs brushing against her hardened nipples, as she moans softly, her head lolling back. She guides his hand down, between her legs, where he finds her pussy already wet and eager. He slips a finger inside, then another, fucking her slowly as she grinds against his hand, her breath coming in short gasps. She turns to him, her eyes heavy-lidded, and whispers, "Fuck me, brother. Fuck me like you mean it."