I am so sorry you are in such a painful situation with your husband. If it were me and my husband was debating between me and another woman, I would leave him, no question. I wouldn't want to be anyone's debate. I would want to be my husband's #1 choice. And yes, as stated above, people who cheat will continue to cheat. It's in their nature. It's that much more difficult when you are currently pregnant, but try to think things through with a logical mind, not an emotional mind. It helps to use your logic vs. your emotions, especially when you feel you still love someone. He will only hurt you that much more if you stay with him. He's not worth it. Let him go.