Cashmon3Y captures a secret sisterly encounter as she catches her brother masturbating in the bathroom. Angry, she storms off, but later, curiosity and desire get the better of her. She returns, finding him still aroused. Slipping her hand around his throbbing cock, she whispers, "What if I wanted this?" He hesitates, then she guides him to her ass, feeling his hesitant thrusts. They moan together, exploring their taboo desires, until a noise outside forces them apart.