I think it's normal for a mother-in-law to take care of the kids.
When we were all working or doing business and there was no one to take care of our own children, I think it goes without saying that a mother-in-law would take care of her own grandchildren. Nowadays many children are brought up by grandmothers who want their sons and daughters to earn more money and live a happy, happy, prosperous life.
But I've seen photos of children brought up by grandmothers compared to children brought up by mothers before. The grandmother's children are mostly dressed in thicker and more bulky clothes, while the mother's children are dressed in more fashionable clothes that can keep up with the trend. Some children brought up by their grandmothers can even do square dancing, and they are very good at it. The fact is, there's nothing wrong with a grandma taking care of a child, even if she doesn't dress well or has some of the actions of an older person.
My brother's family's children are usually brought up by my mother-in-law. Whether they go to school or eat or sleep, my mother-in-law is in charge. I don't know what my sister-in-law thinks, but when she is working, she wants to earn more money, so there is no way for her to take care of her. But when she's not working, she doesn't care much about the kids. She doesn't even ask how the kids are doing at school when she gets home from work, and she doesn't even care if they've eaten. I don't buy snacks for my kids, but my mother-in-law does. I think my mother-in-law is really good to the child, she dresses the child every morning, eats with the child, and takes the child to and from school. My mother-in-law also washes the child's clothes and brushes the child's shoes. It's as if my mother-in-law is the child's mother, and the child doesn't sleep with my sister-in-law at night, but with her grandmother.
It's great to have a good mother-in-law, but you can't go too far with your daughter-in-law. You have to take care of your own children, and if you don't have the means to do so, it's only right that you give your mother-in-law a chance to take care of them. The mother-in-law will not not take the child, now the mother-in-law is very close to the grandchildren.