In the throes of a shared porn marathon, the sister's masturbation escalates, her pussy gushing with excitement. As she fingers herself, her brother's hand creeps onto his cock, matching her pace. She catches him, her eyes locking onto his. "You want this, don't you?" she teases, wiping her juices onto his fingers. He nods, his cock throbbing in his hand, ready for whatever she has in mind.