Ok noted, will not talk to best friend. I had a feeling it wouldn't be smart.

I think all of my actions and interactions with the W since confronting her about her "friend" would indicate to her that she may lose me.

Going through the separation of finances, asking her to find her own place, not spending any time in the same room as her, should be a pretty clear indication.

Thanks again for the advice not to engage with her best friend.