Sister-in-law is too clever to be filial to her parents. She always wants to carve up her parents' things, which is very cold-blooded.

Is your brother afraid of his wife or dotes on his wife? It's the same in my family, but it's not as bad as yours. Have a family meeting and ask your sister-in-law why she is dissatisfied with her family. If it doesn't matter, it means that your sister-in-law has to plan for the future. When you say that she is unhappy all day, is she dissatisfied with her family? As a member of the family, we should do our part and know how to be a family. Talk to your brother. ...