Can Prince Charles and Camilla have influence on whether Catherine will be Queen consort when the time comes?

Prince Charles, who is next in line to succession to the throne, will have the authority to make the decisions concerning the royalty succession. His wife, Camilla, would be a mere queen consort, just like Prince Phillip, Queen Elizabeth's husband, is now just a figurehead with no royal influence at Buckingham Palace. He has other official duties. Camilla would have no authority to say that Princess Kate could not be a queen consort when Prince Charles takes the throne. He would make that decision, and I see no reason why he would want to prevent Kate from being queen when the time comes, and Prince William becomes King. At least that's my understanding.