In the dim light of their shared room, an 18-year-old virgin girl, her heart pounding, tentatively reaches out to her sleeping brother. Her fingers trace the outline of his manhood through his boxers, feeling it stir awake. He groans, half-asleep, as she tentatively explores, her breath hitching at the size and warmth. Guilt and curiosity war within her as she gently pulls him free, her inexperienced hands learning his body, her eyes wide with wonder and trepidation.