When homicide cop Rick McCulloch learns that his wife, Martine, is having an affair and wants a divorce, he turns to his best friend -- Martine's twin sister, news anchor Trista Barrineau -- for comfort and advice. Trista and Rick also have a romantic history that's shaped both of their lives and it's past time that the truth came out. But can either of them -- or Martine -- handle hearing it? Pamela Browning's Snapshots (3) has a believable enough plot and conflict, and the chapters in Trista's first-person voice have a nice immediacy to them. But there's something a little disconcerting about the whole loving-one-twin, marrying-the-other scenario.