Do not criticize each other's parents.

Each of us has something to say about our parents, and even more so about the parents of a wife or husband. But don't give in to this temptation. Even if the husband himself complains about his parents, the rule continues to work. Do not give in to provocation, do not get involved and start scolding his mother or father along with him. Just say, "I understand you." Don't say yes, "yes, your mom is a really terrible woman!"