Incestuous teens' masturbation marathon interrupted

In a cramped closet, brother and sister, bound by religious constraints, find solace in each other's company. They strip down, their breath heavy with anticipation. Michelle, the elder, guides her brother's hands to her breasts, her nipples hardening at his touch. He tentatively explores her body, his cock stiffening against her thigh. They grind against each other, their moans muffled by the closet's narrow space. Just as they're about to cross the final boundary, a floorboard creaks, signaling an unexpected intrusion.

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