Hi Hfb. Happy belated birthday!

I hope your daughter and partner are healing well and quickly. Being sick is not easy and sometimes I think when those we care for are sick is even more difficult. It is such a helpless feeling.
Does she honestly think she can just ignore the last four weeks? She always does this, has an episode and then acts as though nothing's happened.
It sounds like she really does believe she can get away with doing that. It also sounds like this does not work for you any more and you want things to change for you and your daughter. I think that is excellent and we here can help you as you sort through your feelings and decide on a way to change things, at least at your end of things. Your mother has been behaving the way she does for a long long time and as such her behaviors are pretty much set unless she chooses to change. We can't force them to get help and even if we could force them to, it won't work unless they want to get help. So lets see what we can do to help you limit the damage to you.

SET can be a great tool to improve communication. Also check out JADE and the articles on boundaries (If you already have or this suggestion has been made already, I apologize)
I fear sending her a letter which sends her over the edge and causes her to do something stupid.
Well, what are some of the things you fear the most? If she does do anything stupid you are not in any way responsible but I have a feeling you already know that. It is an incredibly difficult thing to consider as the fear of what she may do is ever present. So the mind can rationalize but the heart says different. I am not sure how to get to a place of peace and acceptance with that. I wonder though if rather than confronting her for all the past behavior, if you just focus on her present behaviors (and future as well) if that might work better for the both of you and reduce some of the fear of her doing something stupid or maybe even take it away entirely. A poster named Ziggiddy (and a board advisor) recently did a thread on confronting the person with BPD (pwBPD). You may find it helpful as there are a lot of good responses there, so here is a link to it--->
https://bpdfamily.com/message_board/index.php?topic=239981.0;allTake good care, and please keep posting so we can help you work things through.
