Update. Last night the W finally talked to me about her plans. She signed a 1 year lease on an apartment and will move in the first week of October. She told me that there is no OM and there never has been one.
My life got much better after my W moved out. I was never able to confirm she had OM but I have always suspected it. I asked my W twice before she moved out and did some snooping but did not find anything. Mine signed a 1 yr lease as well.