US First Lady Hillary Clinton does not confide anything personal in her mother, the older woman revealed in a rare interview out this week, and she isn't ``over-emotional''. But the popular wife of beleaguered President Bill Clinton is ``a very sensitive person,'' Dorothy Rodham reportedly told the glossy magazine, Vanity Fair, in its February edition. ``But she is able not to over-emotionalise it. She doesn't go into one of these horribly over-wrought kinds of tizzies. That's one thing I never did either,'' she said.In a lengthy profile of the First Lady, the sort of work for which she is famous, journalist Gail Sheehy tries to understand what keeps the Clintons together despite the President's admitted philandering. ``Hillary's addiction is Bill,'' Sheehy concludes of the Methodist-lawyer-turned-First Lady. ``He is her only rebellion, the only thing she can't logically explain.'' Regarding the First Lady's future, she quotes close friends as saying Hillary Clinton will ``definitelywrite a book, probably more than one''.