I have experienced this, However, we were not married, merely in an extremely serious relationship, I must say, this was by far one of the hardest things that I have ever encountered, I hurt, I was angered, felt helpless, and needed guidance, Off the bat, I was in no way going to forgive her for that act, because cheating is the ONE act to me that stands as the most extreme case of betrayal, I cut her out of my life all together, Then I tried to forgive her, but I wanted to have nothing to do with her still, She sees it as wrong of me, So to this day I do not talk to her, but occasionally she will contact me with some childish greeting, or attempt at a conversation, I am scarred for life because of this, or until the RIGHT ONE comes to heal my heart, When dealing with this, faith is a must, My beliefs helped me tremendously through my situation as I'm still coping, But to answer the question, a husband should be able to forgive his wife for adultery, but that is all, she will ultimately be judged in front of The Almighty,