Sewing devices into his clothes. All reaching a tipping point. I just said to her, baby, baby, what have you done . What have you done . Nightline will be right back. Reporter good evening. Thanks for joining us. For Jennair Gerardot three was certainly a crowd. A wife who thought she had it all only to be betrayed by her husband and brought to a breaking point sending a startling final member before committing the unthinkable. Here is abcs amy robach. She had planted recording devices in his office. It was a listening device. It was sewn into the lining of your jacket . Correct. Reporter it sounds like a spy thriller. She had taken my phone and had it cloned. Reporter but its a Real Life Love story, turned tragic. It took five seconds and i screamed and ran to her. And i just said to her, baby, oh baby. What have you done . What have you done . Reporter an affair. Reporter that lead to a fatal encounter between a wife and the woman she thought would replace her. I come outside all up