Mother in law: Whose responsibility is it.. your husband's or yours?

What you tell him is that when you call her out on this its not going to go very well for allinvolved. As the son he needs to let her know that she is to respect his wife. I had a serious problem with this and my 2nd wife. Sadly we arent toghether anymmore and i know there was room on both adults to make a change m-=but i will say i had my wifes back the entire time it was just an ugly thing.