What should my husband do if he takes mistress home?

He wants to play both sides, so you should make a decision as soon as possible. The door is open, which shows that he has begun to show his sincerity in righting mistress. Your tolerance will only make your situation worse. He can't break up with mistress like this. You should be sober. After a long time, with children, life will be hard. Either he or the hostess will drive you away. Your husband is rubbish and unworthy of your love. If you have no children, you'd better leave him. A word for you: women are not cruel and unstable. If they can't stand it, they have to leave. If a woman is cruel to a man, she will come out.