Your wife would take from what I remember minimum of twelve WEEKS to get past him... and THAT is assuming she has NO reminders of him floating around... no gifts, no letters, no photos...
She sees him how many days a week? Five?
It will take her at least SIX months AND the following will help that along :
1. OM NOT saying ANYTHING to her, IGNORING her COMPLETELY 2. OM showing commitment to his wife... bugying flowers while at work and telling everyone they are for his wife, OM announcing he is reknewing his vows in Hawaii this summer, him bringing his wife and kids in to work to meet everyone, etc 3. Your wife NOT pursuing him actively.. her TRYING to ignore him.
As it is,its gonna take her a LONG time, assuming He sends HER consistent and CLEAR mesages that he's a married man.
He SHOULD have done this in the first place instead of putting the moves on her... NOW he's got her chasing him... the idiot
And the fact that he's saying things like "we can't talk like that anymore" pretty much is him admittin they were having an emotional affair.. he isn't saying affair, but he's admitting it when he says "that way"...
Ideally what you WANT is OM PROTECTING your marriage like your OTHER friend is doing... long term goal at best...
But your wife chasing him around is good practice for him.. he NEEDS to learn to say NO to people who threaten his marriage, and he has'nt had enough practice at that...