Interesting. My wife is 47 and the OM is 42 and divorced. Like your situation, I am not sure how excited he would have been to take on 3 young kids. I think that once their bubble was burst and reality set in, they realized things were going to be a whole lot different then the fantasy world they were living in.
My wife's EA went on for over a year from what I can tell, so I imagine it will take her sometime to get over it. I would prefer actions over an apology and hopefully she can move in that direction. Time will tell whether or not she can re-invest in our marriage.