Maybe it has to do with the fact that in FA the guy had a good marriage and a sweet child at home. He shouldn't have been messing around in the first place.
Same here Margo.
Fatal Attraction did serve as a cautionary tale I suppose, but it felt a bit dirty watching it knowing that he probably did that sort of stuff regularly even with a beautiful wife and child. Didn't like his character and therefore my sympathy was totally towards the wife NOT him!