I wouldn't confront her about anything. Confrontation only pushes people away. If you want her to "want" you, act in an attractive and desirable way. Maybe even flirt with W a little but without any pursuit (that's important!). Imagine yourself a Don Juan type of guy.
With any luck OM may get jealous and confrontational with your W and that would make your sitch easier.
You CAN have female friends and have conversations with them and flirt with them a little. I personally wouldn't go further then that or hint at more because it can backfire.
Mystery is always useful. Like say you are going out with "friends" on your blog (even if it's just guy friends) and then describe the attractive women you talk with, or bits and pieces of their conversation. There's nothing wrong with that if you are separated and W is considering D.
I wouldn't give too many details. Mystery is better....
There is no arriving, ever. It is all a continual becoming.