Allowing one's wife to visit her parents who have bad habits

Somewhere I read that a husband should allow his wife to visit her parents home weekly, but what if her parents teach her things which affects me and my family (husband's family) like they teach her not to do work in the husband's home etc. To avoid such problems, I don't want her to go to her mother's home.

My mother in law and father in law usually fight with each other, sometimes they also hit each other and exchange very bad words and scold that's why I usually tell her that I will also accompany her whenever she goes to her mother's house and tell her that I won't leave you there alone. By this she sometimes feels bad and behaves differently. I told my mother and father in law as you people fight I'm afraid to leave my wife in your home, and suggested to them to read fazail e Amal daily for their improvement. Please advise me what to do.