Wha hoppen to Princess Caroline?

Both the New Yorker and New York magazine have long pieces that purport to go behind the scenes of Caroline Kennedy-Schlosser's aborted bid to be appointed U.S. Senator from New York. Unfortunately, while both have a fair amount of interesting detail, neither really tells us exactly what happened or why? Did Paterson always plan to appoint her, or did she drop out because she'd gotten word he didn't plan to? My hypothesis is that she got a big taste of New York-style politics, developed a pretty good idea of how drastically life would change if she went to the Senate, and decidedshe didn't want it that badly. John seemed more like the natural politician of the family.