SWITCHEROO Once upon a time, there were two identical twin sisters, Alison and Courtney. They were alike in every way: Both had long, blond hair; huge, clear, round blue eyes; heart-shaped faces; and winning smiles that melted hearts. When they were six, they rode matching purple bikes up and down their family’s driveway in Stamford, Connecticut, singing “Frère Jacques” in a round. When they were seven, they climbed up the big-kid sliding board together and held hands the whole way. Even though their parents gave each of them her own bedroom with her own canopied princess bed, they were often found sleeping on the same twin mattress, their bodies entwined. Everyone said they shared that indescribable twin connection. They made promises to be best friends forever. But promises are broken every day. In second grade, things started to change. They were little things at first—a dirty look, a slight shove, an indignant sigh. Then Courtney showed up in Ali’s Saturday art class insisting she was Ali. Courtney sat at Ali’s desk in school on a day her sister was sick. Courtney introduced herself as Ali to the UPS man, the new neighbors with the puppy, and the old lady at the pharmacy counter. Maybe she pretended she was her sister because Ali had a little extra sparkle, a certain something that got her noticed. Maybe Courtney was jealous. Or maybe Courtney was forced. Ali made me do it, Courtney