Incestuous siblings' forbidden frolic ends abruptly

Bored step-siblings, Michelle and her brother, masturbate together, Michelle's fingers dancing on her clit while her brother strokes his thick cock. Caught mid-act, they argue, but later, they strip naked and openly pleasure themselves. Michelle's eyes widen at her brother's size, fantasizing about it filling her. As they're about to act, an intruder forces them to halt their erotic escapade.

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