Halfway left abusive relationship, what to do now?

WOW.... this isn't all in your head at all... this woman clearly abused you as a child and is still using her authority as your mother to still take control of you. No you can't stop your child from seeing her grandparent but you can be there when she does see her, like only let your mother see your daughter while you are there with them, this is your child and you can decide when and for how long she sees her grandmother. No you're not at all wrong for wanting to end this relationship and by you ending all contact it is showing your mother that she is no longer in control of who you are. Also don't ever, not even for a second think that you are being unfair because your not, your mum is using money as another way of saying look what i have that you don't, she's not being nice she's just abusing you further by attempting to make you feel bad about how much money you have. You don't need her in your life as all it's done is cause you misery and guilt, you have your own family now with your daughter and husband and as long as you've got them in your life, you've got everything you will ever need! <3 x