My first thought about her quick turnaround is that you were her Plan B. Apparently, her Plan A either dumped her, or she thought it wasn't working out. So, she calls good ole MPK. She pours it on and makes you think she's feeling the love again. But wait.......something happened to cause a dramatic and fast change. Seems Plan A is back.
If you don't have kids with her, my advice is stay where you are. Why move back and make yourself available, knowing she is capable of treating you in this manner?
The biggest thing is not to pursue her! She has already called you a stalker. If you move back, she may get a RO against you........then what? Go dark......and do it from Chicago.
Btw, why did she divorce her previous H's?
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!