He has control over you whether you realize it or not. he has control of your emotions and mental well being. this is a bad place for you to be in. Understand that if a man and woman want to cheat, they will find a way to do it and a very sneaky way at that. To top it off they will lie about it continuously until some solid evidence is found. while you are worrying yourself about this matter so, he probably has already slept with others behind your back.
The fact that he cheated on his wife with you should tell you that this man has very little credibility. What goes around comes around. You slept with him when he was married and he will sleep with someone on you. Such is the vicious cycle of love and romance. You will simply have to learn to cope. Worrying yourself will prove pointless in the long run because no amount of tears or worry in the world will stop a cheating heart from straying. I don't care how beautiful you are or how good in bed you were, some men like variety regardless. Beauty has nothing to do with it. Men like and enjoy the thrill and stimulation of a new body. Just do the best you can and brace yourself for the worst. I would like to tell you otherwise, but if I did I would just be lying to you.