I'm NC with my older sister, C, and keep my younger sister and SIL at arms length. I will do this, I suspect, for the rest of my life. I don't trust them, not one bit.
C behaved appallingly over our Mother's death last year, focusing all her anger directly onto me (I was Mum's carer) and accusing me of everything from mental instability, lying, theft, abuse and god knows what else. I had to involve a solicitor, eventually, to get her to stop the onslaught of abuse. The only truly fortunate thing is that C lives overseas and can therefore be completely out of my life without any problems. I don't expect she'll ever attempt to contact me, but if she does, she'll get told to fuck right off.
The others....my younger sister and sister in law - well, they just wanted an easy life and so turned their heads away so they wouldn't have to take "sides". I was left exposed to the hostility and hatred, with only my husband and friends giving me any support.
I don't trust them. They said one thing to my face, how sorry they were that C was being so awful to me, then went right back to C and had a jolly lovely "family time all together". Excluding me.
So I've moved on. I focus on my lovely husband, who supported me without making it worse. I concentrate on my amazing, patient and loving friends, who came to the funeral with me and surrounded me with love, strength and a wall of arms wrapped around me, keeping C as far away from me as possible. I suspect even a tank couldn't have got through them.
I survived the suicidal moments. I close my heart to those who hurt me, who tried to damage and destroy me, and I choose to live and love those who showed me, just when I really needed it, how much love they had for me.
They're my TRUE family. The others....that's just genetics.