What is the solution to a mad mother who just wont back off.?

My what will soon to be mil is a queen b!#$H? After the 1st day of being in a new home with our 1st child my fiance asked everyone to allow us the 1ST day home to ourself's to adjust to everything. low and behold be for the night was over the mother comes over unannounced, walks in the house and doesnt speak continue's to walk in my room and call me all kinds of s and etc. well i'd had enough of her outburst and i called the cop's to remove her of my property.Please understand theres a history of her saying these things to me and i've never said anything back or reacted. Its now causing problems with me and my fiance because i wont allow her mother in my home until she can respect my home. I just dont get it, i take care of my child im a good man and she acts as if im the devil himself. 3 YEARS OF THE ABUSE FROM HER HAS BEEN ENOUGH. Even my fiance tried talking to her but she continue's to act out. EVEN IN CHURCH!! What do i do??????