My sister may only be thirteen but she is pretty hot. I have always wanted to see her naked, but I have not.
One day I got this great idea. I cut out the double lining in her bathing suit. Now, when it gets wet (we have a pool) I can check out her cunt and pussy hair (she has some) and tiny tits.
After her suit gets wet and I get a good look I go and masturbate like crazy. One day, I caught my little brother doing the same thing. I told him no big deal that we all do it. But, I did kinda like seeing him with his hairless penis all erect. Maybe one day I'll let them walk in on me.