So hurt!

My mother has never been the best mom to me and my sibling, when I first told her I was pregnant she wasn't bothered at all, my mother-in law has done more for me she's doing my baby shower as she couldn't be bothered to help, she's brought my step brothers gf flowers for her when she was pregnant and taken her shopping and everything , but when it come to me it's different, my mother-in law has even helped me wash clothes and helping me get reading for the baby witch my mother is suppose to help me with, after a massive argument she's lied to people and made my partner so angry when he was doing up her house that we paid for ! So my other half said he don't want her to see our baby as she's done this to me so many times and she not just hurting me but my unborn baby so I agreed , I'm 36 weeks this is my first child and so hurt and down cuz of this, will she change and have I done the right thing ?