He tells me he doesn't owe me any explanation as to why. I am having trouble dealing with this fact. I know there are other resources for respite, but I can't get over the hurt. How do I tell mom that he does not want to watch over her? It will break her heart.
We would all be better off if we would just learn to say, "No, I can't do that" from time to time.
Let it go, get other respite but make sure that if there is an emergency, he is the one who gets called by the hospital.