A cute little sister and her virgin older brother take a bath together in close proximity lol. They wash each other with lots of bubbles, looking super embarrassed, when the little sister pulls back her brother's foreskin and washes it, turning him into a man! Her brother's fully erect penis explodes, and the little sister asks, "Is it okay if I'm your first...?" Her sexual awakening leads to a gentle, intimate first-time sex session, all kept secret from their parents...