I have to agree with Snodderly. Don't say anything. If you did, he would think you were checking up on him/meddling and you don't want that.

Let him stew for awhile as I am sure he is feeling lousy today.

The Bomb: 08/05
H moves out: 06/2006
H moves back: 01/07 & Out again: 01/07
H moves back: 03/08 & Out again: 04/08
H moves back: 05/09 & Out again: 07/09
Divorced 08-12
Kids: 22, 20, 19