The siblings' religious upbringing has instilled in them a deep sense of guilt and shame, but it hasn't extinguished their primal desires. As they huddle together in the closet, their bodies betray them, their skin prickling with goosebumps, their hearts pounding like drums. The older sister's breath hitches as her brother's hand brushes against her thigh, the touch sending a jolt of electricity through her. She can feel his hardness pressing against her, and the knowledge that it's her who's causing this reaction spurs her on, making her brave enough to reach out and touch him, to explore the forbidden territory of her brother's body.