I remember during our S it was comforting to hear that others spouses said similar things. It's part of the script.
There wasn't one thing that changed my H's mind. As many other vets have said before the WAS can feel when the LBS drops the rope. I had started realizing that maybe life was better without H. Also I did not involve myself or ever acknowledge that I knew about Ow (there were pictures all over FB).
So he says he saw the boys and I having fun, doing well and all without him. Weren't we supposed to be devastated and sulking at home? I was polite and short with him on the rare occasions we did see each other. I was always nice but didn't pursue (this was a few months after -- I really struggled with pursuing, detaching etc). He said it hit home when He set up his place and was looking at pictures of the boys and I that he had found packed away.
This is why detaching and GAL is so important for you because it shows you that you will be okay whichever way this swings!