She discovered that Kevin wasn’t going to work as he claimed, but secretly meeting a much younger woman. Recording every step, Rachel watched him share intimate moments with this girl on the subway and in a café. There, she realized she wasn’t the only one tracking them—another man, Mark, was also watching. He turned out to be the girl’s father, seeking proof of her dishonesty and poor choices.

Rachel and Mark joined forces. He wanted to expose his daughter’s lies; she wanted to collect evidence for a divorce. They agreed to confront their betrayers together. Mark introduced Rachel to his ex-wife, Laura, the girl’s mother, and played the incriminating recordings. Laura was shocked and furious, having planned to gift her daughter money for college.

Together, the three adults waited at Laura’s home. When Kevin and the girl entered expecting a romantic evening, they