Worried mother in law

[worried in law]

Daughter in law is a high conflict, rude, and manipulative person.  Son is on a roller coaster ride with her.  Expecting first child in several months.  She's refusing to talk with me.  Has many signs of a very high functioning person with BPD.  I'm very worried for my son and what his future holds should he stay in the marriage.

[Turkish]

What events led to to her refusing to talk with you? How open is your son about discussing his own issues with her? I ask because we have a lot of sons who shut down communication with their parents.  If you have some type of "open line" Then that's good to start.