I don't think i am but I suppose the point of me posting is for some advice moving forward, a rant or just some validation. Or a reality check should that be the case.
For context: I am a lone parent with very little support. No friends, no ex involvement and very minimal family around, particularly those who are positive. I have been a variety of low to no contact with my mum since I was about 16 year old due to abuse and neglect. I spent a significant amount of time in foster care growing up due to this. Over the years I have attempted to build a relationship with her but it has always resulted in further abuse, additional trauma and at times me being physically assaulted. I have had a lot of therapy for this and am now in a really good place in my life. My DGM passed away in March and due to my DGD needing more support I and my DC have had some level of contact with her and my youngest brother (who, as horrible as it is to say, is also awful). This contact is minimal and somewhat civil.
The issue: Over the past few weeks my mum has consistently tried to isolate me from my DC. She's made backhanded comments, undermines my parenting boundaries and openly makes plans to take my DC out for the day alone. The past few times I have ignored, left or just made us unavailable. Today she has messaged me saying she is on her way to collect my 9mo DD, no warning, no previous agreement, nothing and I've had to stay out shopping longer just so I'm not in when she turns up. To some this might not be a big deal but I just feel really uncomfortable with this and her trying to "bond" with my children. She isn't a nice person or someone i trust to be a healthy role model. I also feel this is a way for her to continue some form of control over me.
I can't really carry on like this though, hiding away or putting up with this. I don't want my DC growing up thinking I'm openly preventing them from a "fun time" with their grandma and uncle, so i need to try and nip this in the bud soon really.
WWYD in my situation? AIBU here? I just don't know if i am clouded by my own horrible experiences with them.