You are in a tough situation. I know that everyone will tell you to leave/kick him out because that is what is best for your and your little girl, but I disagree. You and your daughter shouldn't have to pay for what your husband has done. Here is what I would do in the situation... Years ago, before men and women got divorced all the time, wives had to deal with unfaithful husbands. Leaving wasn't an option, but how do you share a bed with someone who is betraying you and possibly riddled with disease? You don't. Confront him with his behavior and put him in the spare room. Move all of his things there and make it clear he is not welcome in your room. Have a frank discussion with him about how VERY costly a divorce would be, and that his only alternative is this. Tell him that if he wants access to your room again that he needs to stay home every night and take a full STD panel, otherwise you will assume that he would rather have his floozies than you and that your marriage will be a business arrangement and nothing more. The arrangement being (of course) that you will not take him to the cleaners in a messy divorce where you air all his dirty secrets, and he continues to support you and your daughter in the style to which you have become accustomed. I know it sounds cold and awful, but what other choices do you have? He shouldn't get to have his cake and eat it too. He shouldn't get to do whomever he wants and then come home and share your bed. And you and your daughter certainly shouldn't suffer for his betrayal. Be strong and make sure he understands how very uncomfortable you can make his life if he wants to play games. How "cool" will he be when his friends' wives find out what he's up to? I certainly wouldn't let MY husband be friends with someone who might encourage him to cheat! Good luck.