Przyrodni brat masturbuje się na nastoletniej przyrodniej siostrze

You came back home from college and saw me walking around my room only wearing my underwear, so you decide to sneak in next to the door and try to watch through the stairs. You manage to see me getting all naked and masturbating a little, then sneak into the shower to watch me washing myself and masturbating with the shower head. Too bad that you get caught, though..and I kick you out of the bathroom ;) but it was definitely enough to give you a boner, wasn't it?