Date rape is always difficult to prove, and the case against New York consultant Andrew Tripping is no exception. Tripping and 36-year-old investment banker Paige Vallis had had dinner together three times before the March evening when he invited her to his apartment and attacked her. Or so she says. Manhattan Sex Crimes Prosecutor Alexandra Cooper needs to know all the facts if she is to find justice for Paige Vallis, but Paige seems to have something to hide. . . .