Florida socialite Jill Kelley is reportedly working on a tell-all book to reveal her side of the cheating scandal involving former CIA director David Petraeus. Friends say Kelley, who was the target of threatening e-mails from Petraeus’ former lover Paula Broadwell, has been shopping a book to publishers as “payback” for the public humiliation she’s suffered as a result of the scandal. Kelley, her husband, cancer surgeon Scott Kelley, and her twin Natalie Khawam, held social gatherings and befriended senior military officers at MacDill Air Force Base in Tampa, the home of US Central Command and the Special Operations Command.