Pull up a chair and work with us for the next six months... .in other words, it's a process.
This is a good primer (article and video):
https://bpdfamily.com/content/how-to-get-borderline-into-therapy The video is long and it might be good to view it in segments.
The short answer is that linking treatment to getting something she wants is the best way. If she wants "peace in the family", better to link therapy to this (and you go to private sessions too so that it is not all about her) than
"hey you're nuts, you need treatment". You wouldn't say that - I'm just making a point.
