Blackfoot,
What do you make of your W sending that tape to you? Verrry strange behavior for one who wants a D, now isn't it.

Also, why are you not interested in her overtures towards you?

You say you will not even go there with her until she is done with OM but how would you know? You don't speak to her or respond to her emails/phone calls, etc.

If you ignore her, how will you know if it's the right time?

Besides, what harm can it do to have a civil relationship with her? I don't understand your "I refuse to speak to her" tactic. I'm not criticizing, mind, I'm saying I'm not sure what the objective is.
Why not speak to her and at least bring civility back to the table and go from there?

And lastly, I could not tape record myself singing (for a variety of reasons, lol) that song and going to the trouble of shipping it to a man without being passionately in love with him. It just wouldn't happen.

Whatever she has with OM is over and done with, despite the fact that she may have not made a clean break yet. Imagine how she feels right now--she's gotta dump him and piss him off, too, in addition to dealing with your anger over the whole thing. No one wants to be hated and despised--even if they deserve it--so she's procrastinating and sticking a toe in the water to see if you are willing to help her do what must be done..namely, to jettison the rat bastard.

I think that this is absolutely something she should do on her own, but you have a choice here: Ignore her and let her continue to flounder, or use some of your wisdom on her and illuminate the path that she must take. Right now, she's walking in the dark and fog wondering where the hell she put herself.