Why does mother-in-law always like to be a demon and make trouble between several children and daughter-in-law? Make everyone unhappy. Pick a fight?

The old lady may have failed to establish authority between her wife and children. The old lady tries her best to turn her wife into a mother-in-law, so she should play the role of mother-in-law. As a result, most of them now belong to their wives. The situation that mother-in-law is a demon is gone forever. I wanted to be a mother-in-law and tidy up my wife, but now my little wife is getting worse and worse. How can I stand it? Several children and wives should join hands to treat the old lady.