I agree, and I should not have made a definitive statement about what I think it is instead. I don't know whether their wife is narcissistic. But having close experience with BPD-afflicted people, I feel the need to defend them. I understand pretty well what they go through (and watching for example videos where other people describe it, and even reading papers, seems to confirm my understanding), and mislabeling other disorders as BPD does them a disservice, in my opinion.
People are going to read this, and then when they meet someone who they know has BPD somehow (for example when getting close in a relationship), they are going to think that that person can become that delusional. That's not what happens.
People are going to read this, and then when they meet someone who they know has BPD somehow (for example when getting close in a relationship), they are going to think that that person can become that delusional. That's not what happens.