It can be argued that if she wants to quit the job she needs to hand back the company jewellery, houses, cars etc that have been "loaned" to her and her husband by the country - i.e. the tools of the trade they no longer wishes to pursue.
With Andrew publicly humiliating himself on television, these last few months have not been good for the Windsors and the press have smelled blood.
Add to that the Duke of Windsor being on his way out - personally I reckon he'll die in the near future - and the Queen not having much longer left either - we seem to be reaching a watershed as far as the monarchy goes.
Perhaps the media will one day regret demonising Camilla - who really didn't do much wrong.