Cuddled up in bed together, the horny stepsister can't resist teasing her brother with her sexy underwear, asking if he likes what he sees. He growls in approval, pushing her onto her back and sliding her panties aside to bury his face in her wet pussy. She moans loudly, encouraging him to suck and finger her harder. They fuck passionately, moving from missionary to doggystyle, her big ass slapping against him as he pounds her. She begs him to cum inside her, and he does, filling her up as they worry about getting caught.