Angel: This is a little confusing......Did he re-marry his ex or was he married the whole time he was dating you and lied to you and told you she was an ex? Things obviously have not been going well for them if he went for you. Like the other poster said, since he cheated on her, he could cheat on you, too, could be a disaster if you stay with him, but I don't believe that once a person cheats that they will always be a cheater. Some people do learn from their mistakes, it's the lying......a terrible way to start a relationship. It may be he was just looking for some variety in the bedroom. Better to let him go and let him deal with his problems.