Hi Serenityandlove

I'm 57 and joined this forum last summer. It's nice to meet you! I'm sorry you've experienced the angst that comes with a relationship with a pwBPD. I applaud you for reaching the point where you have decided to move forward in your own life with peace, joy, and positive energy. When I landed on this site, I was in full crisis mode, with nothing figured out. So glad you also found a T that you click with. I have one too. It's such an important support.
If for example, I shared my work with her I was "insecure and needing her approval"; if on the other hand she shared her work with me I would praise it and congratulate her. That's the least of it. On a bad day, she gets vulgar and attacks my core self-esteem, accusing me of being a terrible person and I won't go into details yet, but very cutting things that are meant to linger with me for years.
Yes. On this site, you have a wide web of people who can relate to this behavior. Your sister and my mother sound like the same person in this respect.
I imagine letters to my husband or aunts and uncles. I will deal with that then by kindly asking them not to get involved. I maintain to everyone around me that I wish her the best... I don't engage in conversations about how to "fix it"... I will speak here or with my therapist to go into details and strategies. I can't expect anyone to understand and of course no one to "take sides", there are no sides to take... I won't tell anyone she's abusive. I will just change the subject or if pushed I will say "You know what, I'm not sure, we are both very busy, like everyone! How about you, how's your family?" Change of subject. And if I'm contacted by a relative who says "Oh, she told me you're not in contact." I will say "Relationships can be complicated, let's talk about something else. How was your trip to Cuba?"
Validating all this!

Clearly you've already done a ton a work, and already figured out your strategies. It's a great plan so far.
I now have to decide how to live my best life, free of unnecessary conflict, judgement or negativity. Everyone's ok, I'm ok.
Yes again. Easier said than done. There'll be hills and valleys as you know, but you are clearly a reflective and determined person. I am so much healthier with all the strategies I now use (such as boundaries) with my mom, so I wish to encourage you that it sounds like you are on a good path forward already! It does get better.
I want to imagine her rage as a gift that I don't need to unwrap, and that doesn't belong to me.
Holy. That's a powerful visual. Sounds like a line that comes out of therapy - but I haven't heard that one from my T. I may share it with her once Covid is behind us all.
I hate to talk to my friends about this because everyone has ideals about siblings and sibling relationships. I do have two friends with suspected BPD sisters so sometimes I'll reach out to them. I'd love the support of others in this forum as I navigate the next few months, which will likely be very bumpy as I head towards a peaceful existence.
We're always here. 24/7. We're in this together. Welcome to the forum!