Until a year or so ago I had only ever masturbated alone, although my wife and I had discussed it and she accepted that I sometimes had to do it. But I had always been too embarrassed to do it in her presence until one night when we went to bed I felt really horny but she had just started her period.
Before settling down to sleep she sat up in bed reading a book as she often did. Because I was feeling aroused I also got myself some reading matter but mine was a sex mag. 'That will do you no good tonight' she mocked. 'I know ' I said 'but I will just read a couple of stories'.
In fact I hardly read any of the stories I was focusing on the pictures of naked bodies in compromising positions and as I don't wear pyjamas it was obvious that I was getting erect. I felt that I had to touch myself and put my hand around my hard cock. Sandy looked but said nothing and went back to her book. I was now fully masturbating with one hand while holding the magazine in front of me. I thought she might object but she actually seemed turned on as she was now watching me more than reading her book. I never intended to climax but I now felt that I was at the point of no return, I pulled back my foreskin tight and my cock throbbed and shot cum out in successive spurts onto the page of my magazine. 'That was extremely rude' she exclaimed 'but you can do it again when I have my period'.
Since then I have often masturbated in front of my wife, sometimes while she strips or sometimes she just tells me what to do and when to come. It's so much more exciting with your partner's approval and involvement.