Camilla is well and truly in the fold. She has taken a leading position in the monarchy and is effectively going to be queen one day.
She feared that if he married a divorcee it would throw the monarchy into crisis again, and I think that is why he never did so during her lifetime.
I think as she gets older ... she will hand more and more responsibility towards Prince Charles and her other children. But she will continue to reign as monarch until she dies.