In the living room, the stepbrother's eyes meet his sister's, a silent understanding passing between them. They've both been fighting their desires, but the tension is too much. She leads him to the couch, pushing him down and climbing onto his lap. Her pussy's soaking, her nipples hard. He grips her hips, thrusting up into her as she grinds down, their bodies slapping together in a rough, animalistic rhythm. The sound of the shower running covers their moans, their taboo lust consuming them.