Ok,I'll get straight to the point,my gf's sister is always telling me about her sexual escapades..and I don't know why!I dont even think that she tells my gf about what we talk about..the other day I went to visit my gf and her sister was there,mind you,her sister is hot.Her sister comes right in the room and sits on my lap in front of my gf,after that she was so eager to take my pic to put it on her facebook..I don't know what's the deal..the crazy part is that I really do wanna nail her...if I do decide I want to how do I tell her so that I don't end up lookin stupid,she doesn't get offended,and I don't get busted?ANY IDEAS?