The alien moon must be shifting, look at all this goofy alien behavior on the board lately!
I will say though, my dad went through a similar experience when his father died. There was a lot of bad history between my dad and my grandfather, and I know my dad had a lot of mixed emotions surrounding his death. The only thing more tiring than emotions are mixed emotions - and doubly so for those who cannot express them.
Now might be a good time to re-initiate the counselor discussion, as MW might find one useful during this time. If it is under the guise of marriage counseling, he can go without losing the macho edge. And, he may feel it is a safe envirnment for him to say what he needs to without running the risk of hurting anyone.
OR, give him some time...once his emotions settle and the moon moves back into place he might go from grinch to bob...
"It is not easy to find happiness in ourselves, and it is not possible to find it elsewhere."
--Agnes Repplier, writer and historian