The Duchess of Sussex, 38, joined the Royal Family for Christmas in 2017 five months before she and Harry, 35, tied the knot. The invitation by the Queen was a break with protocol, according to royal author Phil Dampier.
Mr Dampier made the comments following the release of bombshell court documents as part of Meghan’s legal action against Associated Newspapers, the publisher of the Mail on Sunday and MailOnline, which claim she felt “unprotected” by the Royal Family when she was pregnant.
He told the Telegraph: “I think the Queen is going to be absolutely devastated by this.
“She’ll cope with it but she will feel desperately betrayed.
“She broke with protocol to invite Meghan to Christmas at Sandringham before they were married, and the couple ended up with a beautiful multi-million pound home in the middle of Windsor Great Park.
“Some will be wondering: what more did they want?”
Meghan stepped out with the Royal Family for their traditional Christmas Day church service in 2017.
It came a month after she and Harry announced their engagement.
They went on to marry in a spectacular ceremony at St George’s Chapel in May 2018.
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The announcement sparked crisis talks between the monarch, Prince Charles, Prince William and Harry.
The couple had hoped to continue supporting the Queen while earning their own money.
But the idea was deemed unworkable amid fears they would be accused of cashing in on their royal status.
They officially ended royal duties on March 31 for a new life in the US.
Meghan and Harry are now living in Los Angeles with their one-year-old son Archie.
They are preparing to launch their new global charitable body Archewell after being forced to drop their Sussex Royal brand when they quit the monarchy.
And they have signed with New York-based Harry Walker Agency for speaking engagements as they launch their new careers.
It is understood they will focus on social issues such as racial justice in keynote speeches and moderated panel discussions.