The siblings' bodies pressed together, their hearts pounding in sync. The older sister's hand hovers over her brother's tented pants, her mind wrestling with guilt and desire. She can feel his gaze on her, heavy and hungry. With a deep breath, she gives in, her fingers tracing the outline of his erection. He lets out a low moan, his hips moving involuntarily, and she feels a rush of power, her own body aching for more. They stumble out of the closet, their clothes discarded along the way, their bodies entwined in a dance as old as time.