Which one is closer, mother-in-law or grandma?

Both of them are equally close. It mainly depends on who you get along with more. If you get along more, the affection will be deeper. If you get along less, the affection will be weaker. This kind of affection cannot be determined by who is close or not. To make a simple measurement, if it were not for these two people, there would be no your parents. Without your parents, there would be no you. Treat them the same. In fact, you know very well which one is closer to you in your heart. They are all relatives. They have this life and no next life. Cherish them. !