Take you own sweet time with that paperwork! As for dinner, make sure it happens when it is convenient to you as in when you are hungry and were making something for yourself anyways. If his health requires something outside of that, keep it simple (store bought soup, sandwich, salad). I would be so not likely to make homemade casseroles, stews, pies, etc. if I was feeling the way you are. Do whatever you can to not let it get to you. Don't feel guilty about staying in your bedroom alone for a while everyday. It sounds like you need a break from him (I assume his dementia makes it hard?). Can you leave the house and do your own thing for a while everyday also? He can't mock you, if you aren't there.....