I don't have advice for what you should do in your personal relationship, but my ex-A did the same thing. When I was firm we were over, he pulled the "I never told ANYONE but I was sexually abused" (in a 5 am voice mail, on MY BIRTHDAY) and even triangulated with his sisters and had them contact me to "verify" his and their memories. To me, this was a very manipulative move intended to tug at my sympathies and hoover me back. I didn't let it, I chose to have compassion for whatever he may have gone through at a distance.