Mother in law

Okay so how many woman out there have a mother in law that they can't stand? And how do you go about dealing with it. Myne is seriously an alcoholic bitch that thinks everything is not good enough. I have tried working this through but she doesn't change her ways. I'm due in April and she gets pissed about the little things like not getting am invitation to my baby shower when she was told verbally. I could care less if she's in the babies life but my SO wants the best but she is just so irritating! Help!