Perhaps you could call it a Fresh Start quilt. Divorce is a difficult process at best, but in the end, what you get is a new start. If she has children, perhaps a block designed to represent her in one corner and a block to represent him in the diagonally opposite corner, meaning Mommy & Daddy don't live together anymore. Then blocks to represent each child with Mommy and another with Daddy. This could remind the children of the love the parents still have for each of them.
I don't know. My divorce was because of drugs and abuse so I was happy when I finally recovered. I have a great husband of 26 years and a wonderful life (busy) now.