I have physical disabilities and almost no stamina. I am unable to work at a job outside the home, which means he supports both of us. In fairness I should then do the housework, but if for some reason I can't, he has to fill in the blanks. I'll be able to do the laundry, empty the dishwasher, vacuum, clean the bathrooms, OR mop the kitchen floor, but no way could I do all of those in any one day. I'd be doing well on a good day to complete two of them. That makes me feel bad sometimes, when he has to come home from work and do chores, but he assures me he knows I'm doing my best. He's also pointed out that if he lived alone, he'd have to do everything himself anyway. It's nice that I'm able to help out even partially.
There is one chore I've taken over completely, though, and that's keeping the cat litter taken care of. He has a sensitive stomach and can hardly do it without gagging. It doesn't bother me, so I take care of it.