If a husband's wife is a good and loyal person and makes a good home for her husband and any children they may have and the husband's parents are not good to her then the husband should always back his wife and it is up to him to have a private conversation with his parents that either they respect his wife or they will not be welcome in the home. However, if the wife is neglecting the husband's parents; being rude to them for no reason then it is still up to the husband to have a talk with his wife and to respect his parents.