Emily Carter had almost reached her table again at an upscale Manhattan restaurant when the manager intercepted her, lowering his voice to say, “Ma’am, I need you to come with me right now. And whatever you do, don’t panic.”

Ten minutes earlier, she had already left after marking her third wedding anniversary with her husband, Alex, his mother Catherine, and a young woman named Jessica, whom Alex consistently presented as his adopted sister. From the outside, the evening had seemed flawless. Alex had been attentive, affectionate, and impeccably composed—the kind of man strangers admired instantly. Emily had even felt a sense of relief, because the headaches and dizzy spells that had plagued her for weeks seemed to be fading.