That was how Nina Brooks entered their lives. Twenty-nine, studying for her nursing license, quiet but steady. She didn’t gawk at Jonathan’s wealth or pretend to be impressed. She asked practical questions, learned the boys’ routines, and when Ethan cried—as he always did—she didn’t panic. She handled him with a gentleness that felt trained by loss. Karen disliked her instantly, planting seeds of doubt Jonathan tried to ignore. He told himself the cameras were for legal protection, but weeks passed without him checking them. Work consumed him, grief hollowed him out, and he trusted that things were… fine.