Thank you for having the courage to share all of these things with us. It is hard enough sometimes to say these things to ourselves, let alone put them out there for consumption. This is a great and supportive place, but it still took courage to talk about your feelings to this extent.
Your posts have been clear for quite a while that you were focusing on you and making your life complete. You have also come across as very clear about your feelings with regard to reconciliation with B.
I know there has been a lot of ballyhoo on the jealousy thread. I hope you'll indulge my thoughts on your thread since my opinion is not welcomed there. There is a very big difference between using a woman as a pawn in the chess game of one's marriage and meeting a woman, organically, and feeling an attraction that a man decides he'd like to explore. The former is the sort of behavior that makes a woman feel like a hunk of meat, no strike that, we are pickier than that about our cuts of meat, like a doll just used to pretty up the LBS and turn the WAS's head. And by the way, it'll make the WAS feel that way, too. The latter is life as it happens to all of us. Surprises happen. Sometines we luck out and get a nice surprise. It does not makes us evil incarnate to accept them.
From what I can tell you have been exceptionally careful in examining your own motives for allowing this woman in. Equally important, it sounds as though you have been extremely candid with this woman.
You may be right, some people here may be bothered by this, but I do not count myself among their number. You are handling yourself with grace and honor. Thank you for sharing this.