Hello, huskergirl &

Your story is tugging at my heartstrings, because I was really in the same position as yours, except for the part about your son's In-Laws; my own D-I-L (whom I suspect has undiagnosed BPD) is close to her parents and family emotionally, but not in location. Her parents live very far away from my son and her, so we do see them more often than they do--even in the past during the times of No Contact, which were put in place by my D-I-L.
I, actually, didn't find this site because of my D-I-L; I came here because my other, older son was diagnosed with BPD a year ago, and I needed to learn all I could about this disorder so I could communicate and deal with him better. Lo and behold, after reading all I could around here, I realized that the myriad of problems our family has been having ever since my younger (non-BPD) son got engaged to and married his beautiful, charismatic wife, were most likely due to her having--at the very least--High Functioning BPD behaviors. Since my BPD son's symptoms and behaviors are unlike hers in many ways (he is Low Functioning BPD), my D-I-L hit our family like a tsunami with issues that we've never had to deal with before within our little nuclear family. These issues
were familiar to us--outside of the 4 of us--because of my (most likely) undiagnosed BPD Mother-In-Law.
There has been No Contact put in place with our family, many times, by D-I-L over the last 10 years. It always seemed like it came out of nowhere, for no reason at all. When my son, in his desperate attempt to support and keep peace with his wife, went along with it, it hurt even more. I always handled it in the "wrong" ways, and was never able to "fix" things in a timely manner. It was stressful, hurtful, confusing and frustrating for all of us in the family.
Once I found this site, the communication tools and techniques I learned about and used with my BPDson (who lives with us--and they worked!), I started using what I learned with my non-BPD son and my D-I-L. Here are the links that I read first, and that helped me right away with them:
Communication using validation. What it is; how to do itTOOLS: S.E.T. - Support, Empathy and TruthThis Workshop:
How do we become more empathetic to the pwBPD in our life was a turning point for me and my family. Once I realized that I needed to take my own feelings out of my interactions with her, and I needed to get beneath the trauma and drama going on and validate the child in her that was driving her anger at us, I handled things with her differently. We were actually still in No Contact with her at the time I participated in that Workshop, but I was able to make things better. Today, several months later, we are still in contact with my non-BPD son and D-I-L, I get to see my new (and first!) grandchild regularly, and things are going well. When you check out that Workshop you will get a more detailed idea of what my problems with her were, how I worked out in my head how to deal with her, and how things got better. I really do highly recommend you read it