I found this interview with Jenny Sanford very very good.
For now, the first lady of South Carolina is groping for the high road and trying to keep an open mind. “If you don’t forgive,” she says, “you become angry and bitter. I don’t want to become that. I am not in charge of revenge. That’s not up to me. That’s for the Lord to decide, and it’s important for me to teach that to my boys. All I can do is forgive. Reconciliation is something else, and that is going to be a harder road. I have put my heart and soul into being a good mother and wife. Now I think it’s up to my husband to do the soul-searching to see if he wants to stay married. The ball is in his court.”
I've only followed the saga from a distance, but this tells me all I need to know. She certainly understands the nature of forgiveness, which seems to have provided her with the clarity of judgement that she needs in this difficult situation. (Those who misunderstand it will see that forgiveness doesn't equal doormat.) Bless this family and guide them Lord. And let us all learn as we go forward.