I have only read your last couple of posts and some of your older ones. It sounds like wife is attracted again because she senses you have a crush on OW. Now she feels a challenge. You are no longer a sure thing. You being attracted to someone else certainly would improve ones PMA. It makes us realize that there is life after rejection/separation/divorce and it makes us less needy.
I know it is against DB policy to date, and I have not formed an opinion on it and I am certainly not recommending that you do so. Especially when things are moving in your favor. But I do notice that when LBS finds or begins to date someone else, WS comes back. (Eyetie and Texas hubby come to mind) very interesting.