@ShadyLady53
Thank you. I've long since got past the point of wanting any relationship with her, but she must be tolerated in certain circumstances as I'm unwilling to sacrifice family events to avoid her. She has isolated me from some family in certain ways already and I believe my refusing contact at all with her would be a massive victory to her, and a way to paint herself as an innocent victim to extended relatives who are without the full picture.
I'm over the relationship angle and don't really see her as "my sister" anymore just "one of the other adult children my parents have"
My real problem is that I have so much relentless unresolved anger over all the various horrific stunts she's pulled over the years, because a reaction is the goal, I have grey rocked her for years, but it doesn't mean I don't feel the hurt/the anger but there's no outlet for it
I contemplated being frank with my mother about my belief she has a pathological disorder but I doubt very much she'd hear it, the family narrative around my sister is that "she always does everything right" but that is merely the impression she gives of herself and not the reality.
Separately, there almost seems to be a code of silence around her horrendous treatment of me, like it's there and people know it, but it's impolitic to acknowledge it, and it's a subject best avoided let's just protect the status quo. As I say I have next to no idea what she's like outside family situations. On about two occasions though, when we've had an exchange where I've calmly indicated I know what she's like, the mask has dropped and she's looked at me with this malevolent smirk like "I know what I am, I know you know damn well what I am, but no one else does so jokes on you"
It's a tough frustration to live with for sure even with minimised contact. I've had lots of therapy.