Hi Sarah,
About this affair thing. I might know how your H is feeling about it.
A couple of years ago I met a woman at an evening class. We just seemed to click. I really looked forward to the class each week and we did a lot of flirting. It felt wonderful to be fancied again after all these years. One week we aranged to skip the class and go out for a drink instead. We had a lovely evening talking about the failures of our marriages. She told me that she had a realy high sex drive but her husband wasn't interested. Of course my story was the same. When she kissed me I realized that I had never been properly kissed before. I felt so loved up. We met a few more times after that and she gave me all sorts of hints that she wanted to sleep with me and marry me eventually. It got to the point where I had to make a choice; The promise of the sort of love life I had always dreamed of or my wife, children, home and wider family. I chose my wife and gave up the evening class. How does this relate to your husband. Well, I never had any sex with my friend but not a day goes by when I don't think about her and wonder what it might have been like. It could be that your H was so flattered by this woman's attention that he is still dreaming about her. It's possible his fantasies could be even stronger if he did not have sex with her because he still has the delicious feeling of anticipation untainted by reality.
David