If these people were so tortured by the pain they were causing - they would have done what good people do. Agreed to no contact, gone to marriage counseling with their spouses, and tried to put their marriages back together. They thought enough of their spouses to have families with them - suddenly none of that matters when they get the hots for someone else?
No. I'm not saying people have to be "trapped" in unhappy marriages their whole lives - some people do make mistakes. But if it wasn't a "mistake" until something "better" came along??? Self-serving bullcrap. And more than that - COMPLETELY creepy to put their business out there in the NYT, completely insensitive to those spouses they claimed to feel guilty about hurting.