If it isn't in writing, it doesn't exist.
Done deal.
If she felt that strongly about it, she should have taken care of it.
It's basic contract law, actually.
If Michael can't prove it, he should stop asserting it.
I hope some of my statements are not written in stone..like...after a nice meal at Thanksgiving or Christmas when , perhaps, I have eaten too much and I might remark...."I'm stuffed, I don't ever want to eat again."
Plus he "remembered after he got the money for her rehab"
The courts will accept testimony regarding verbal requests from the spouse. "It" does exist.