Doesn't make a difference from his perspective. The problem is that the W is attracted to him. The OM is a distraction and has he constantly wondering 'what if'. She will still have some of those thoughts, but at least it's not going to be a constant reminder to her and that she's not going to have an opportunity to grow and nurture their relationship.
Put it this way. If you start developing feelings for someone that's not your spouse, it's probably not a good thing.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.