Unbound: Incestuous Exploration

A brother and sister, alone and restless, discover a taboo path to intimacy. She touches herself, he watches unnoticed, until he bursts in, catching her mid-masturbation. They argue, but the tension escalates, leading to open masturbation in front of each other. Her eyes widen at the sight of his thick, hard cock, and she fantasizes about it filling her. Just as they're about to cross the line, an interruption forces them to halt their forbidden game.

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