Problem of Mother in Law.

Hi i have been married from 1 and half year, there is only 3 people in my home(me, huby and mother in law). I have some problem with my mother in that she always interfare between me and my huby talk and whenever we have fight, she always speak between us and finaly satart drama with fall on floor, any my hubby thinks that, all this happening due to me, so he stast shout on me, keep away from me for some days. And MIL she keep sad and dont talk with me and cry every time. I dont know what i do with it. Can anyone help me.