My husband's mom is very sick. At first he was taking care of her with his 2 sisters then one left and the other started to lose interest. Today, my husband is doing nearly everything for her, including staying up nights and days. Since 3 weeks he is tired, unable to sleep at night, aches everywhere and when he is not helping her, he just lay in bed and cannot do anything. He even started missing work. I told him he was probably about to have a burnout and that he needed to take care of his health first.

He disagreed and said he does not have another choice. But one sister is still living at home with his mom, rent free. Yet, he will drive 20min multiple times a day to give his mom medicine or take her to the doctor or hospital. Or worst, sometimes he drives there to let his sister's dog out, feed her or do returns and pickups for her. I called his therapist to tell her how bad it is, thinking he was maybe downplaying the whole thing, but she pretty much told me he had to and that it was normal to care for sick parents.

Today, he couldn't get out of bed at all. But his mom had an appointment that she had to go to. I suggested uber or his sister but he said only he was available. I insisted it was a bad idea and that he needed sleep and food (he barely eats because he is too tired). He ended up taking her to the doctor and long story short, when I walked into his mom's house to let the dog out, his sister was laying on the couch, watching netflix. I was pissed. On the way home I told him he is hurting himself, that this has to stop and that this is not normal.

He yelled at me and said that me nagging him was way worst and that I was the bitch here, to do that to him while he is already so sick. AITA?