I've tried it. It showed me what I needed to know.
I asked my WW to leave when I the Inn she was at (GPS records) for hours one afternoon/evening confirmed the OM was registered there that day. I told her that she was making a mockery of our M and that she was not welcome in our home as long as the OM was a part of her life. Over two months later, I had heard from her 4-5 times and met with her 3 times. The third time was initiated by me to say that I loved her, please repent, and come home. I did not back down, and I made it clear that time was up. I told her that I would get the D process started soon if she didn't do what I previously stated. That was Sunday afternoon, and I caught them together at the house she was staying at on Monday night. Despite everything she was telling me, the A never ended and they were way more than "just friends".
So, if after three weeks your WH is not talking with you, it's time to file for D. People told me that, and I didn't want to believe them. But, if that isn't the grenade that finally wakes him up, then at least you'll be further down the path toward your healing. I wish that I would have gone ahead and filed two months ago when I met with my attorney the first time. I would almost be D by now, but instead I'm sitting here still married to a woman that does not want to be married to me. I hope you don't find yourself in the same situation because you waited around for someone that was not coming back.