I find this comment absurd.
If she considered marriage sacred she send him packing. He betrayed her trust in the worst way and her "Christian" forgiveness is posing and posturing; pure crap in my book.
Forgiveness for this jerks disgusting betrayal is his business with G-d.
If she had a shred of self respect she dump him and move on. Obviously the "church" is more important to her than righteousness.