David Ford, a Wall Street billionaire, and I, a simple Southern girl who can’t always pronounce words correctly, formed an unlikely friendship.It began when my husband, Tink, and David’s wife, Pamela, were working on a television project. Pamela, exotically beautiful, had shooed David and me out of their 30,000 square-foot historic mansion (built by a Titanic survivor) in Newport, Rh...