Hi sistersbpd and welcome

Seven decades of BPD behavior in a family is a lot. It's good to hear that you now have a frame of reference for what happened and what is happening, and that your husband is supportive of you and helps you through the drama.
Would you say that your biggest concern right now is the impact on your mom?
Are there any other family members involved in caring for your mom? Is your dad in the picture?
Fill us in on how things have been going;
kells76