The sound of muffled moans leads you to the next room, where you find your sister-in-law in the throes of self-pleasure. She's on the bed, her legs spread wide, a massive black cock in her hand. She's masturbating, her body bucking as she imagines it's her husband's thick dick she's stroking. She's so caught up in her fantasy that she doesn't notice you watching. Her pussy is dripping, her clit engorged, and her body is coated in a sheen of sweat as she brings herself closer and closer to orgasm.