As far as I'm concerned, WW has chosen the OM. Her actions make this crystal clear.
Because of this, I have no real need to conversate with her, other than money issues child issues. Therefore, I do not speak to her. If she asks something, I reply with a short answer, but that's it.
It sucks because she's still in my home, refusing to leave. One good saving grace is she's a flight attendant, so she's usually gone 4 or 5 days out of the week. But, when she's home, it sucks. My stress level goes through the roof, and because we live in a small home, it's nearly impossible to avoid her.
On my lawyers advice, I've played dumb, and basically confronted her on nothing she does. This has really worked in my favor because she's basically hung herself. I now have plenty of evidence and documentation to file for D under Adultery. But it sucks having to play a fool, and let her think I know nothing.