Distract her and encourage her to learn a musical instrument or other skills. Let her old man have no time to go shopping in the supermarket. At the same time, your father and son always let her have a certain amount of fruit or vegetables to eat. After a few months, she formed this habit, and your goal was achieved.

In addition, I suggest you take your mother to consult a psychological counselor to see if your mother has this habit because of some experience.