When i was a kid.
I got naked for no reason and show to her my penis because i love to see her reaction.

I also pretend that I accidentally scrub my hard rock penis to her butts and walks away.but the next level thing happen.when my sister doing it to me.she pretend that she accidentally scrub her pussy to my hand.i notice that and it shocked me because my sister is always shy .but i dont know what to respond for that because im just a kid.but if feel really gud when my sister is interested on me.