Susan Cheever, the daughter of John and a respected writer in her own right, has a forthcoming book about what she calls "the addiction we adore" — sex. " Cheever tells Page Six, "If you have credit card debt, it's a problem. If you drink too much, it's a problem. But if you're falling in love all the time, [people… » 5/09/08 2:20pm 5/09/08 2:20pm