I'm so pleased to have found this thread but I'm also sad to see how many others are in a similar position to me.
I used to be very close to my sister but our relationship has deteriorated over the last few years, mainly due to us looking after elderly parents but we had completely opposing views on how much care they needed. On top of this my sister is, and always has been, a manipulative, miserable, control-freak who has to have absolutely everything done her way and does not know how to communicate with people other than by shouting. I'm not for one minute saying I'm perfect, but I know I am far more easy going and (usually) reasonable.
Both parents have now passed away and things came to a head a few months ago after our father died. My sister suddenly became nastier than I have ever known her and said a whole load of really horrible things to me. I wasn't in a position to deal with it because I was grieving. I decided at that point that the best thing to do was go NC. Unfortunately her (grown up) children have decided to side with her. I have no idea why they have done this and can only assume that my sister has fed them a pack of lies. I know that I have done nothing to deserve this treatment and it saddens me as I used to be really close to them. I expected so much more from them as they have all fallen out with her at some point or other, sometimes for years at a time. She is toxic and poisons every relationship.
I feel like I have lost half my family in one go. None of my sister's family have contacted me for months now and have done petty things like 'unfriended' me from social media. I am now thinking of moving away to put some physical distance between me and all of them.
But I can honestly say that my life is better without my sister in it. I'm sad that we don't have the relationship we once had but I can't face going back to how things were. I don't want her judgement and constant criticisms. I'm also sad that others have followed her lead but I've seen another side to them that I didn't know was there. I do have other family members who I get on very well with but none that live locally.
I'm sorry that I've ranted on but it has helped enormously to get it all out. I wish you all well and can honestly say that I know how you feel.