In a divorce, it's always the other person that is a sonofabitch. Men side with men and women with women. Maybe 3rd man did not want any part of the drama. But for X to be lacking in emotion? Not even a hissy fit? Yeah I see why you got divorced. Probably a great sense of relief and sadness. I try not to go back to mine. I had one explosive moment with her a couple years after but that was a coda that broke me out of emotional denial. For you I am glad there was no drama.