You know, everyone, it just hit me -- and I don't really know why it hasn't struck me until your comments, Saffie, about the OW -- but I now realize that my W is the OW as seen from the OM's marriage's perspective. My W is hurting the OM's W. To the OM's W, my W is the OW.
It would be immediately obvious to anyone outside this frame of reference, and so I am astonished at myself for not having fully made this connection in my own mind until now -- THAT is the pedestal I placed my W upon, ...and that is the pedestal we all just saw crumble. Amazing.