Okay...so if he wants someone to listen about what a horrible wife you were, I am glad it is a therapist
Some people just take longer to get to where they need to be and sadly, some people never get there at all. It sounds as if he still has a LOT of forgiving to do.
Hopefully IC helps him to look a little more objectively at his own life and how he lives it every day.
Depression is such a big black hole and if this is what it is, he will benefit from his C to begin to get out.