Talk it over with her. Have a face-to-face discussion, and - before you begin - make sure that you have all your points lined up, so that the mother-in-law can't suddenly catch you unawares.
Rica1122, thanks - your posts show how big an issue this 'monster' seems to be for you, arousing strong feelings etc. I hope your life soon takes a turn for the better.
Update: so I spoke with my "Monster in law"
We are both the same sign & we are from to totally diffrent worlds.
However, Things were address, Apologies were made & Now I have a "Mother In Law".