It's hard to know WHAT'S going on in their heads right now because they don't even know themselves. He may be going to "improve himself" (because he can't see beyond the tip of his nose right now), but he may learn a few things that surprise him about his marriage.
I know I've gone kicking and screaming to things I didn't want to in order to placate WH - and ending up learning something. Perhaps that will happen this weekend to your WH.
You'll have to let us know what it's like and how it goes.