A sister with pre-wedding jitters and her virgin brother take a family bath together for the first time in over 10 years. "There's no way I'd get turned on by my sister's boobs," he boasts, but as they wash each other with bubbles, his sister pulls back his foreskin, causing him to get a rock-hard erection and revealing his virginity. Even though his sister has a fianc , her big cock awakens her sexuality, and the siblings celebrate with incestuous sex, raw sex, and his first time.