outrageous mamma

Does anyone else ever have problems with their SO mother and father. Doesn't matter what I do I can't please that damn woman. She's all the time bashing me when I'm not around (boyfriend recorded one of her rants) and she's constantly telling him I'm going to cheat on him. I help her with anything she needs whenever I'm over and it still doesn't seem to work. She's one of the biggest hypocritical people I know. Me and my boyfriends relationship is getting more serious by the day and I fear if we got married she would be that mother in law that hates me.