My wife recently switched from a feature phone to a smartphone. She had never been eager to upgrade, saying, "I only contact you anyway," but the moment she got a smartphone, she became instantly addicted. At first, I didn't think much of it, but her behavior started to change. I began to sense something was off when I noticed deleted messages in her chat history. Unwilling to suspect my wife, I still asked a tech-savvy friend to recover the data. That's when I discovered she was having an affair—and her lover turned out to be my own classmate.