Bored and curious, a young brunette stepsister asks her stepbrother to teach her about sex. He agrees, but only if she promises to keep it a secret. He starts with a lesson in oral pleasure, guiding her small hand to stroke his growing cock. She tentatively takes him into her mouth, gagging slightly at first, but soon finds a rhythm. He teaches her to use her tongue and lips, rewarding her efforts with moans of pleasure.