I think OM had already effectively dumped her last fall. Her mother essentially told me so. Her subsequent nasty attitude toward me and our M then finally was the last straw for me and I dumped her too. I think she then put together her ridiculous plan to do this international work to try to entice OM back. Sounds like her plan failed, now she's all alone, and she's realizing she's lost control of half of her kids' lives.
My gut tells me she wants to get something back from me to ease her anxiety over my apparent moving on. I will ignore her message.