When visiting her hospitalized brother, the older sister accidentally notices his erection. At the time, the brother is still a cherry boy and shyly asks his sister to teach him how to handle women. Hesitant at first, she's moved by his innocence and decides to help him. Starting with touching her big tits, progressing to kissing techniques and how to touch his cock, the brother becomes increasingly aroused. Unable to resist any longer, the sister gives in and lets him go all the way.