i went no contact with my mother around 8 years ago. it remains the kindest thing i have ever done for myself.
my daughter (who is very nearly almost 15 but that's another story!) was simply told that Nana couldn't and didn't keep me safe as a child, so i can't be around her as an adult.
sounds simple, doesn't it? it is, but not at all easy. it has been good for me - however the day-to-day is still very hard - a loving family is portrayed everywhere as the standard to uphold but it isn't like that for everyone.
be kind to yourself.