hi AboveWaterToday, and

this isnt an uncommon scenario in marriage therapy, unfortunately.
I have relatively thick skin toward wife's raging but am not sure what best next steps to protect daughter are. I am thinking therapy for daughter? How can she learn the skills to cope with BPD mother while mother is in denial?
very broadly speaking, there are two separate approaches:
1. protecting your daughter
2. working to get on the same page with your wife, in terms of parenting.
it will help for us to know more.
what started happening five years ago, and what led to marriage therapy?
can you tell us more about your wife raging and criticizing your daughter? how do you respond?