According to royal biographer Christopher Wilson the duchess knows there are “barriers” in her way to becoming Queen Camilla but she is a “tough nut to crack”.
“The couple have seen off doubts as to the legitimacy of their marriage after some constitutional experts claimed it was illegal,” Wilson notes.
“However, nothing short of a revolution can prevent Charles ascending the throne after his mother's death — but a legal challenge to the legitimacy of his marriage might put a stop to Camilla being crowned.
“And so, despite her cautious, shrewd game over the past 20 years, there could be a barrier in her future path. Yet with that knowledge, she soldiers on.
“It's hard to imagine Meghan, Duchess of Sussex — as Camilla did last week — allowing herself to be photographed walking through a guard of honour of litter-pickers dressed down in hi-viz jackets with plastic bags full of rubbish.
“Yet for the Duchess of Cornwall it's all part of the long game. She's a tough nut to crack.”
Charles and Camilla first fell in love in the 1970’s, before finally marrying in April 2005 at the Guildhall in Windsor, with Camilla becoming the Duchess of Cornwall.
It is claimed the Prince of Wales is keen to give his wife the title, Camilla Queen Consort when he ascends to the throne, despite previous claims she will be known as Princess Consort.