Hi Mommakiwi,
I am in a similar hard place so I totally can feel for your sister. By the way, she is welcome here, she is trying to keep it together with BPD family members just like you are and would very likely benefit from becoming a member.
O got engaged a few months ago when I was in contact with my dBPDm. We had been talking on the phone after 3 years of NC. Things were smooth, so it felt.
Mom had a freakout over finding out that I like to hunt, and BPDm is an animal rights nut and a vegan when impulse control doesn't get the best of her
She said some very evil stuff and then hung up on me and we have been NC since (a few weeks), she also hates my fiance and weddings overall.
She was communicating with our dad, but since he has continued to beg her to contact mom she has determined she may need to stop taking to him as well for her own safety and sanity.
Hmmmm sounds like an enabler, My BPDm has one too, its my Gmom. I am Lc, and Gmom is very sympathetic to BPDm.
She is looking at a May/June wedding and does not want to invite my parents if they are still in their current emotional states.
I am in the exact same boat! I imagine your sis really wants to have the loving support of her M & D, as do I. But after a long and hard self talk I have decided that my BPDm is not going to be happy at the wedding, and that she has proved that she has no interest in being respectful of me and my fiance or our life therefor does not want to be a part of it.
She is afraid of the fit my mother would most likely throw durning the wedding
ME TOO SISTER!
plus one aunt will be invited that our mother no longer communicates with, and has disowned. That I insult will cause a fit with our mother.
I invited one of my BPDm x's becuase he has been closer to me than my own dad. Bipolar dad will have to live with that.
Heres my advice, after reading dozens of the wedding woes threads, BPDm's are at their worst at special events and will cause great drama either before , during or after the wedding. Your sister is starting a new chapter of her life and a new family. Inviting crazy to the wedding is the same as inviting crazy to your new life and chapter. I and you sister have this in common... .It is no longer just us we will be subjecting to our mothers it will be our beloved husbands and future children. Perhaps it is easier to shield them than ourselves.
Get her on the message board, we should stay connected and see how it goes! Good luck sister, be the strong woman and wife you want to be!