I am not an expert on such things, and I'm not sure that your H fits the profile, but you might take a look at the Midlife Crisis forum.
They have very good advice on dealing with WAH's, and can help you figure out if he is going through an MLC; they can be triggered by traumatic events such as the death of a child.
Last edited by TrentC; 04/12/1003:49 AM. Reason: Added link to The Prayer Circle
Me: 44, Wife: 39 M: 17 years T: 20 years Bomb on 08/25/09 1/13/10: MC started 1/28/10, 2/8/10: More bombs 8/28/10: Wife moved out No talk of D, no movement