Maybe he needs to join a caregiver support group or even some personal counseling if he'd prefer to do it on a one on one basis.

I'll be honest with you and say that I don't think that behavior is typical.

I'm guessing with any chronic high pain condition -
Some partners/family may with draw emotionally or even be resentful or angry , but still stay in the home.
I've read comments like this on our other forums.