On a day when I attended a friend's wedding with my wife, a woman caught my eye. She wore a sexy dress and exuded a subtly erotic aura. For a brief moment, I thought our eyes met. I even felt she flashed me a sweet smile—but I convinced myself it was just my imagination. However, several days later, she suddenly showed up at my house. The shocking truth was revealed: she was my wife's long-time best friend! That moment shook me to the core. Was her smile meant for my wife? Or was it a signal directed at me??