Bored and horny, the stepsister decides to turn bath time into a full-body exploration. She teases her big tits and ass, loving the feel of the soapy water against her skin. Her brother walks in, catching her in the act. Instead of shaming her, he joins in, offering his thick cock for her to clean. She eagerly takes it, sucking and stroking until he creams all over her face. She laps it up, asking for more, and he obliges, fucking her until she's filled with his hot cum.