Don't have another half, but I'd still masturbate even if I did. I see no reason to stop and I wouldn't be offended if he did the same, so long as neither of us was doing it to the point of neglecting the other.
Not sure if you were trying to ask me this question or not. But yes I would take care of myself whether or not he was around. I see nothing wrong with taking care of myself whenever I need too. Unless the setting isn't appropriate.