A slavish mother-in-law is always the last one to eat. Not only in her mother-in-law, but also in others. I often see it in my aunt. It's almost time for everyone to eat a third. Even after cooking, they have to wash dishes and wipe the table in the kitchen, delaying serving. Because the tutor in the village can only move chopsticks when the elders are at the table. After dinner, everyone went to have tea and chat. My aunt is still eating slowly at the dinner table. It's time for another meal. Her daughter-in-law had to wait for her to finish her meal and help her wash the dishes quickly.
I didn't understand it at that time, but later I learned that she was also in this position when she was a daughter-in-law, and she hoped that her daughter-in-law would be in this position. I think her daughter-in-law should stand up and resolutely resist such behavior. Insist on being yourself, everyone can accept it, and there is no such slave role in natural families. If it is not acceptable, divorce is very necessary.