It's amazing how socially unaware they are sometimes.
Do you think your ex had read up on BPD (and had read about this tactic in that context)?
Yes, horrible to say but I called her socially retarded a few times after the break up.
I'm not sure if she had read about BPD.
She claimed to have PTSD and never mentioned BPD.
We had one break up and I told her that I thought she had borderline traits, as I did after this final break up.
After our reconciliation after 1st BU, she never mentioned it.
I told her that her dishonesty and behavior is not normal and she needs to talk to someone.
I hope she is doing that and perhaps reading up about BPD. Sadly, I don't think she could face something like that. PTSD is easier to "own", I think.