My sister-in-law is very mean to my father and scolds him behind his back. How can I punish her?

Friends, it is fate that people meet, and as relatives and family members, it is the fate cultivated by generations. We should cherish fate. Besides, it is difficult for an honest official to break housework. Home is more important than reason. Your sister-in-law was raised by her parents, and your parents didn't raise her. Understandably, they are certainly not as tolerant and understanding as their parents and children. For the sake of family harmony and happiness, you'd better stop adding fuel to the fire, otherwise, although time passes quickly, it may bring irreparable harm to the family. I suggest you do more persuasion and adjustment, be more respectful to your parents, and be more tolerant and understanding of your sister-in-law. I believe this can't completely solve the problem, but it is more beneficial to your parents' comfortable life. I wish you happiness!