A brother, his cock tenting his pajamas, enters his sister's room, drawn by her soft moans. She's on her bed, legs spread, fingers buried in her pussy. He watches, unseen, as she brings herself to the brink, her body writhing. Unable to resist, he joins her, pushing her fingers aside and replacing them with his cock. She gasps, arching into him, as he starts to fuck her. Their bodies slap together, their moans filling the room, until they're both left shaking, their bodies slick with sweat and cum.