Watching Your Step-Sister Shower

After all the years of living together, your step-sister still never learned to lock the bathroom door. She comes home from a workout and you decide now is your chance to perv on her in the shower as your parents aren't home. Little do you know, she sees you there the whole time and she'd been leaving the door unlocked on purpose, so she puts on a little show, pressing her ass against the door, the room getting steamy as she lathers up her perfect, chubby body.