Incestuous siblings' secretive masturbation session

Bored siblings Michelle and her stepbrother find themselves alone, leading to a forbidden exploration of their desires. Michelle fingers herself in the bathroom, but her stepbrother catches her, sparking an argument. Later, they decide to masturbate openly in front of each other, Michelle admiring his thick cock. Just as they're about to act on their mutual attraction, an unexpected intrusion forces them to abruptly stop.

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