My mother-in-law likes to take care of everything. What am I supposed to tell her?

It's no use talking, and she won't change, because in her mind, these are all things she must do and won't change because of your appearance. What she fears most is that her children will grow up slowly, and her way of education and doting will conflict with you, and then there will be another family contradiction. So it is recommended to live separately! Otherwise, she won't let go, you won't be happy, or all kinds of contradictions.