Poor Charles got the brunt of the wrath:
A well-placed source said: "She bawled at Charles at how she felt let down by their closest aides and how they didn't put her feelings first.
"She knew in the end she would have to pull out or she would have to feign an illness at the last minute.
"The row was ferocious. Camilla just went for Charles and told him exactly what she thought. But she keeps telling herself revenge is a dish best served cold and she will get her own back.
"One day Camilla believes she will be Queen and she will be able to exert influence and make decisions within the royal household.
"She thought there wouldn't be a problem in going as she was invited by Prince William and Prince Harry. But just because they wanted her to go didn't mean the public did."
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