I honestly think she's just waiting until the queen steps down, because she knows that if she tries to cut and run before then QEII will more than readily send the royal equivalent of a tactical nuke after her for the shit she's pulled on the family. Charles, OTOH, is probably too milquetoast to do anything about it, and I'm not sure where William would stand on it but he'd probably be more than willing to welcome his sad sack brother back into the family if the excess baggage wasn't in the picture.