My wife knows I masturbate several times a week, if not daily. A lot of times, I lock the door and do it in private, not really out of necessity but because sometimes I just like to be alone. But she has seen me do it as well. She does it too and while she is still a little self conscious about doing it in front of me, she always makes it a point to tell me after she did with this sort of 'guess what I just did' smirk on her face. It's sexy as hell. Sometimes I think that look on her face afterward is worth more than watching her.