I've name-changed for this, as a) it's a sensitive subject and b) very identifying.
Back-story: My DM have always had an odd relationship, and I have my suspicions that she has narcissistic personality disorder. We're also about as different as it's possible to be.
It's her birthday today, and I completely forgot. I felt awful about this when I realised it was too late - it's too far to pop down for a visit, and I've put a card and present in the post.
This morning, I've had an email from her saying "you really don't care do you? I realise how little I mean". This was at 9; I was planning on calling the afternoon.
So as not to drip-feed, this is a woman who:
a) Covered-up a sexual assault whilst on holiday (not rape, but still traumatising - I was 10), and provided zero support afterwards.
b) Attempted to blackmail me away from moving to London post-Uni ("your Nan will die with worry if you move").
c) Didn't ask me how I was during pregnancy, and doesn't ask how DGS is now - he was sick whilst on FaceTime last week, and she hasn't been in contact to check he's okay.
d) Threw a massive strop about my wedding being in a 'pub' (a naice pub though 
) and then demanded that I spend the evening before my wedding cooking a large family meal (they had to travel) for everyone.
My argument would be that she doesn't seem to have any care or consideration for me... I'd also like to point out that I call her twice a week for a chat. In the seven years since I left home, she has never called me for a chat.
AIBU to cut contact? It feels like the final straw - a complete lack of recognition for how she's behaved. I know it's not an eye for an eye situation, but I'm astounded by the message.
Or should I just suck it up, send an extra large bouquet, and see if the past can be overwritten?
Thanks for getting this far. It's been very cathartic (for me, at least).