I was the WAW in an A. I'm pretty sure how that mindset works. I'm telling you that as long as you are willing to see her (contact) while she is willing to continue breaking her commitment, she will keep eating the cake you serve her. Drop the rope you have tied around her.
The next time she decides she wants to go over her plan to stop contacting OM, I suggest you tell her that she's a smart woman who doesn't have to hash out her plan with you (again). When she finally succeeds with ending things with OM and can stop contacting him once and for all......to let you know. Otherwise, you have nothing else to discuss about him.
You probably won't hear this hard stance from most LBS posters here. But I'm telling you that she will drag your heart to hell & back again if you go with any kind of softy-boy stuff.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!