maybe she is just a little stressed and worn out from being a mom, homemaker and caregiver to you? would it be possible for someone else in your family to help out at your home a few days and your wife get a few days away? does your 14yr old pitch in at home? even somewhere close like a nice hotel or at a girlfriends house or something might refresh your wife. I find people in my life get burned out on me and need a break sometimes. Hang in there, you have been dealing with a lot too!