A curious teen stepsister sneaks into her stepbrother's room, catching him mid-masturbation. Instead of fleeing, she's intrigued by his throbbing cock, leading to an impromptu lesson in oral pleasure. He guides her inexperienced mouth, teaching her how to take him deep, how to swirl her tongue, and how to make him groan. As she improves, he rewards her with a thick load, her first taste of cum.