The monarch insisted “I want nothing to do with her” and vowed never to forgive her future daughter-in-law for cheating with Charles while he was still married to Princess Diana, it has been reported.
During a late-night martini-fuelled exchange at Balmoral, Her Majesty allegedly let rip at her son as he desperately tried to end hostilities between the two most important women in his life.
And the Queen continued to give Camilla the cold shoulder even after she and Charles were both divorced, investigative author Tom Bower claims.
The stand-off came as Charles attempted to seek permission for he and Camilla to live together openly.
Mr Bower’s book, being serialised by the Daily Mail, claims: “On that evening, (the Queen had) several martinis, and to Charles' surprise she replied forcefully: she would not condone his adultery or forgive Camilla for not leaving Charles alone to allow his marriage to recover.
“She vented her anger that he had lied about his relationship with what she called ‘that wicked woman’, and added: ‘I want nothing to do with her’.”
A ’distraught’ Charles is said to have “boiled with frustration” over his mum’s unwillingness to see his point of view.
But he refused to bow to pressure from his family and split with Camilla – telling a royal aide how his mum “needed to move with the times”, according to an excerpt of the book.
It wasn’t until 2002 when relations finally began to thaw after the death of the Queen Mother.
Buckingham Palace maintained the Queen “welcomed” Charles and Camilla’s engagement in 2005.
But she reportedly refused to mention the bride by name during a speech at their wedding and deliberately ignored her during the knees-up reception.
The revelations were published in REBEL Prince: The Power, Passion and Defiance of Prince Charles.
It comes as Prince William reportedly confronted the Queen after dad Charles snubbed Kate Middleton’s mum.
Charles is said to have felt “usurped” by Carole and Michael Middleton.
Daily Star Online exclusively revealed on Sunday how the Royal’s “desperate” plans to make Camilla Queen had suffered a major blow.
Brits have rejected the idea that she could get the top job when Her Majesty dies.