Re: married a serial marrier?
I wouldn't have married him, but that doesn't make you a fool. You fell in love. Telling you what you should do about this is hard, considering you are pregnant right now. Pregnancy hormones, even after the birth, can wreak havoc on your emotions. Sometimes you blow things out of proportion; sometimes you don't give them enough importance. You make a decision; then you change your mind.
My best advice to you right now would be to focus on your pregnancy, and the baby once the baby arrives. Give it a few months after the birth, maybe even 6 months or so, to get your hormones a little settled, and then look at the situation and decide what you want to do. Personally, I think he probably got divorced 3 times because he got caught cheating. And I think if he cheated that much, he won't stop now. In the end, your best option would probably be to divorce him. But I hesitate to tell you to do it now, because with the pregnancy hormones, you could regret it not because it was the wrong decision, but because those hormones can really mess you up. Good luck!