I don't think your OW was all that unsual in approaching you. Think there are quite a few predatory females out there who don't care whether a man is married or not. (males too, I guess)
It's pretty easy to become emotionally involved when you are rejected by a spouse. Anyone who makes you feel better about yourself is going to seem rather attractive.
You just need to not act on any of those feelings and try to work on communication with your W. Any time anyone else is fulfilling your emotional needs, you will be less inclined to feel like working on your M.
