Look ill trow you a bone here,
I have the opposite.
An officially diagnosed narcistic brother that almost did me at one point.
And i can only say that getting rid of family is way more easy then tolerating them.
Now unlike other people i wont say just forgive cos family.
After all you can pick your friends but not your family.
But do keep in mind that once you leave them you can never go back.
So if you are ok with being alone with 0 friends and like me not talking to family for 15 years now.
Then you know wat to do.
If you cant handle a simple task like that then just tolerate her for the sake you dont wanna say farewell just yet.
Just do note that if you drop family members, then the rest is soon to follow as most family's will resort to calling you the black sheep.
The choice, the future is in your hands.