He just seems content to move on and sort out a routine for the boys.
If this is really true, then he needs to see it for what it is. It may take weeks, or months... Sometimes we need to experience something before we can really see that it's doesn't work.
FWIW, I think you shouldn't try to talk him out of it. He'll only dig in his heels and strengthen his position. Act as if, look nice, be friendly and light. I promise, this isn't even close to the end.
