Discovering taboo in tight quarters

The siblings, Michelle and her brother, find themselves alone and bored, their mutual frustration boiling over. Michelle, annoyed, retreats to the bathroom, where she begins to masturbate, her fingers exploring her wet pussy. Her brother, bursting in excitedly for a shower, catches her in the act. They argue, Michelle calling their mother, but later, they make amends. Naked, they masturbate openly in front of each other, Michelle taking in her brother's thick, straight, huge cock. Just as they're about to act on their mutual yearning, someone enters, forcing them to abruptly end their erotic encounter.

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