Raws - if she is with an OM, you created the opportunity, you did NOT cause her to make that choice.
I read something today that would be a good quote, but my book's at home. But the point is that there are plenty of people out there ready to undercut you; you don't need to do it for them.
After rereading it, the context is kinda jumbled. But the quote is: Stop undercutting yourself. There will always be people out there to do it for you.
My point is that you are not responsible 100% here. Take ownership of your faults, misdeeds, and poor choices. Fix them so you don't make the same mistakes again.