My mother is an alcoholic. After putting up with her getting progressively worse over 15 years, I'd had enough. Nothing mattered more than her next drink. My siblings, her step children, their children, her sisters, everyone has gradually gone NC with her over the years until it was just me. Her behaviour became more and more intolerable and was having more and more of a negative effect on my own mental health.
I went NC in November 2017. I'd got married not long before and had given her the ultimatum that she came sober, or not at all. To my amazement, she made a huge effort and was totally sober. Rather naively, I thought that may have been a turning point, but it wasn't.
I wrote her a letter. I told her how I felt, outlined the emotional abuse over the years and told her that as soon as she is ready to accept there's a problem, I'll be there to support her 100%. I also told her that my husband and I would be hoping to have children and that in her current state, she'd be having nothing to do with them.
I had a few abusive messages soon after (mainly around money that she seemed to think I owed her, in fact it is more likely the other way round - I bailed her out of thousands of pounds of rent arrears over the years purely because I had a younger sibling still living at home) but since then it's been radio silence.
I have no idea if she knows I've had a baby (I think it must have got back to her by some route or another) but she's made no contact. Having had my own pregnancy/baby, makes me think that there's some major psychological issues going on when I consider how I feel about my child, compared to the upbringing we had.
Interestingly, very shortly after going totally NC I happily stopped having counselling and came off of antidepressants for the first time in years. Funny that...