My sister constantly has her 10-13 year old friends in and out of the house and for reference I'm 17.

At the beginning it wasn't a big deal to me I kinda just saw them as my little sisters too and I would occasionally socialize with them.

It's getting bad....they are always wearing short tights and most of the time they have wedgies so I see prints of their privates sometimes.Every time I see them my dick gets rock hard in my pants and depending on the type of underwear I have on it kind of shows and I like when they see but I don't think they say anything.

For the past few days I've been thinking about doing something but I don't have the balls.

I really want to touch them and possibly fuck them too but I don't see how I would get away with it.