In the dim light of the closet, the siblings' bodies glisten with sweat. The sister, her once modest dress hiked up, grinds on her brother's cock, her panties pushed aside. He grips her ass, pulling her down as he thrusts up, their bodies slapping together. She leans back, her hands on his knees, riding him harder, her tits bouncing. He reaches between them, circling her clit, making her gasp. Their fucking becomes frantic, their moans louder, until they come together, her pussy pulsing around his cock, their bodies shaking with the intensity of their taboo pleasure.