If mom doesn't want to communicate with you, you can also consider communicating with dad first to see where you can hear more information. At this time, you may need to be a "peacemaker" or a "messenger" for the time being, and make a good emotional bond between parents.
But if you find some of your mother's ideas hard to understand or make you anxious, it may be beyond your power, and it may be more appropriate for her to seek the help of a professional marriage counseling agency.
My mother often suspects my father of cheating. For so many years, it never stopped. My father is also a very prestigious person in our family, probably because of his personality. It is really "success is also a character, and failure is also a character", because my father is the kind of person who speaks very sweetly to people. Now it is my mother's "hard evidence" that my father is easy to cheat.
At that time, my father tried to pursue my mother in various ways. A few years ago, we had a very good relationship and traveled around together. But in recent years, we have often quarreled about this matter. After a while, it was either hearsay or related to some small details.
Every time my mother complains to me, I try my best to defend my father from all angles, but it seems useless. My mother seems to understand sometimes, but it will recur after a while. I don't know where the root of all this is ... how to eradicate it, I can only communicate again and again.
The emotional relationship between parents will also affect our time as children. Many times I wonder, if I am a "father" and meet such a partner, what should I do? I am sad to see my mother in such pain and my father in trouble.
The best way to deal with this problem is to study psychology more, be a parent's psychologist, communicate with parents more, and save their love and happiness from as many angles as possible.