We have no way of knowing what goes on between anyone else and God. Let us not judge. That’s God’s job. Neither of us are even personally acquainted with her.
From what I’ve read, Elizabeth Edwards has been a very unpleasant person whose ongoing ugliness was part of what drove her weak husband to his stupid adultery. I don’t know what the truth is. But suffering tends to refine the spirit, and cancer brings many or most people to their knees before God. There are few atheists in the radiation oncology department of a hospital. In any case she needs our prayers.