In the dim light of their shared bedroom, the siblings succumb to their forbidden longing. She's a vision of innocence, her body barely concealed, as she tentatively reaches out to touch him. He's hard, ready, his cock throbbing with need. She guides him to her, her breath hitching as he enters her. They move slowly, cautiously at first, then with growing urgency, their bodies slapping together as they chase their release. The room fills with their gasps and moans, their bodies glistening with sweat and sin, until they collapse, sated and spent, in each other's arms.