A suggestion my C made to me (I do all the bills and H never knew what was available), you could give him a spread sheet showing what came in and what went out. I started doing this twice a month. I would list our income and then show what bills were paid and how much was paid.
M 5yrs 1st baby-girl born 6/18/08 Bomb: 10/13/07 OW - I was 6wks Prego H Moved in w/OW: 11/2/07 D Final 07/10 OW had his baby 3/17/09-so her Me, now - happier than I ever was with him