Yes, well, been there, done that. I'm 16 and share a room with my 18 year old sister. I caught her masturbating looking at porn on the computer in our bedroom She was in her bra and
panties and had a hand stuffed in her
panties and was just about to cum as I walked in. We talked about it and agreed it was ok. That night, I masturbated in my bed and I really wanted her to know I do it too. I kicked my covers off and just did it. The next morning, Alison said that she knew I had done it to make her feel ok about getting caught. Since then, we are much more open about it. If either of us wants to do it then we do. Only once have we ever done anything kinda together, and that was when I saw her using a small
vibrator. I wanted to know what it felt like so she held it against my clit (over my
panties) and I told her it was going to make me cum. She just held it there and I cummed into my
panties. We havent done anything together since. Its kinda horny to have someone in the same room when your doing it.