The woman at the center of the Gen Petraeus cheating scandal fired off a threatening email to a military liaison in the State Department whom she felt was getting too close to him, it has been revealed. An official says 37-year-old Jill Kelley in Tampa, Florida, received the emails from Petraeus biographer Paula Broadwell that triggered an FBI investigation. Details of the affair between Petraeus and his biographer Paula Broadwell reportedly came to light during a FBI probe of the emails that she allegedly sent to Ms Kelley. The new revelation raises the possibility that Broadwell was growing increasingly jealous...