What else can you do? She is your mother in law, and despite being selfish and unreasonable, she is your mother in law, and this cannot be changed. Unless you have divorced your daughter-in-law, in which case she is no longer your mother-in-law. If you and your daughter-in-law can't go on, and you want to get a divorce, that unreasonable and very selfish person, you still have to treat her with courtesy and serve her well. You can't just treat her the way you want to be treated because you can't stand her habits (unless of course your position in the family is unassailable and you're not afraid to let your daughter-in-law have her way with you).
The first person who flashed in my head when I saw this topic was "Xue Zhenzhu". Yes, it's the mother-in-law who was loved and hated on TV a few days ago. Xue Zhenzhu, she is really selfish. She saw her eldest daughter's son Jun has a newly bought bag, silk scarf ah. She tried it herself, and when she was about to leave, she said to her daughter, "Oh, my daughter, this bag is quite good, you have a good eye, give me a few days to take it to carry, when you want it, just tell mom, mom will immediately bring it to you." And when her daughter had any problems after the divorce, she ran to find He Han, a person who originally had nothing to do with her family anymore. At this time she is selfish, only thinking of her own interests, but not considering the thoughts of others.
Returning to that unreasonable, that Xue really is an anti-target. She that mixes up, no one can control it. Go to that old man's home to make a fuss, flying to find that old man out. In the hospital is also a variety of crying ah, make others are a little helpless. She ah, really selfish, really rude, can be said to be the mother-in-law of the fighter.
Just like the mother-in-law in this question. Despite all the discomfort, let's think about it more carefully. She is selfish, but actually only superficially selfish, and in the end, for her own family. She's unreasonable, but it's the very same unreasonableness that has allowed her to raise her two daughters on her own and not be bullied by others.
So if you have such a mother in law. The other side of the coin is that your mother in law has her own "lovely" things to say. The only thing that you need to do is to get out of the way for the sake of family harmony.