You should know which woman is your real love. I have a cowoker -a man, he divorced with his wife because his wife had an affair. He remarried a Vienamese girl in States. He told me he does not love that girl, all the marriage is about green card and longlyness. He said he nisses the family that he had with his ex and he would never find that feeling again.If the time could go back, he would not get divorced. But now, it is too late. You should not marry a person who you do not love. I can tell that you don't love that girl. You just feel good because she might love you. Your wife just a normal fragile woman. Woman sometime need to depend on somebody emotionly when you were not there for her.She just need a shoulder to cry on. If she could give up the affair and come alone with you, you should accept her again with your heart.