Anna Grevenitis, a forty-six-year-old French photographer who lives in Brooklyn, is the mother of two teen-agers: Andoni, a lean, restless fifteen-year-old who just started shaving, and Luigia, eleven months his elder, who has thick-rimmed glasses and shoulder-length blond hair, the tips of which she dyes every several months, to match the latest shades of stars like Taylor Swift and Billie Eilish. Luigia, who goes by Lulu, is her mother’s usual muse. For most of the past decade, Grevenitis has photographed her daughter daily, with such studied devotion that Andoni, in his childhood, became envious and begged Grevenitis to shoot him, too. Her son outgrew the routine—“He doesn’t want to see me with my camera next to him in the street,” Grevenitis told me recently—but Lulu, who loves to dress up, still relishes the attention of the lens.