It has been suggested that one way Anakin's turn to the dark side can be written into the script is by having the Emporer make Anakin think that Obi-Wan has been trying to romance Padme. This COULD be a factor that drives Anakin to hate Obi-Wan. It makes sense, as Yoda said concerning Dooku, "lies, deceit, creating mistrust are his ways now". Such is the way of the dark side.
I just stumbled upon a full cast list for Episode 3 and it lists that Rebecca Mendoza plays Bail Organa's wife. This could shut down rumors of a Padme/Bail relasionship... or just make the affair more even more adulterous... I say there wont be an affair just my guess... It would make me not like Bails charachter then making me happy when he gets his in Ep. 4