The sources claimed Meghan and Harry have “no plans” to join the Royal Family on the first Christmas without the late Queen.
This comes after Penguin Random House announced the title and release date of Prince Harry’s much-anticipated memoir.
The title “Spare”, to be published on January 10, “completely caught by surprise” the royals, one source claimed.
Speaking to the Daily Mirror, the source added: “This book could spell the end for any relationship Harry wants to have with his family, it is desperately sad.
“Everyone is bracing themselves for yet another fraught and frantic period at the mercy of the Sussexes.”
Express.co.uk has contacted representatives of the Duke and Duchess of Sussex for comment.
Prince Harry first announced he was writing a memoir in July last year.
While only a few details about the book were shared at the time, the press release by Archewell – Meghan and Harry’s organisation – hinted at the possibility the memoir would allow the Duke to set the record straight and tell his own story, as it stated the Duke would, for the “very first time”, share “the definitive account of the experiences, adventures, losses, and life lessons that have helped shape him.”
READ MORE: New details of Prince Harry’s memoir exposes ‘deep shame’
The description of the book released on Thursday and its title, which refers to the “heir and spare” saying, reinforced the belief among some commentators the Duke could provide insight not just into his life but also into his relationship with his relatives and the institution of monarchy.
It read: “With its raw, unflinching honesty, Spare is a landmark publication full of insight, revelation, self-examination, and hard-won wisdom about the eternal power of love over grief.”
The latest announcement by the book’s publisher also confirmed the Duke, as previously shared, would donate his proceeds from the book to charity.
The royal already donated $1.5million to Sentebale, the organisation he co-created in 2006 to support vulnerable children in Lesotho whose lives have been affected by HIV or AIDS.
The Duke will donate a further £300,000 to one of his most beloved patronages, WellChild, which supports families with children living with life-limiting or severe illnesses.
Fears the book will include more criticism, attacks or allegations against the Firm or its members come after the Duke and Duchess of Sussex opened up about their struggles as senior members of the Royal Family on multiple occasions since they bowed out of the institution in the spring of 2020.
Speaking to Oprah Winfrey in early 2021, the Duchess of Sussex made serious allegations of neglect and racism against the Firm, while the Duke spoke about his relationship with Prince William and King Charles.
Harry also appeared to criticise the upbringing given to him by Charles when he appeared in an episode of the Armchair Expert podcast and in the series he co-created with Ms Winfrey titled The Me You Can’t See.
Most recently, in an interview given by Meghan to The Cut magazine, the Duke appeared to slight his family while speaking about his and the Duchess’s home office arrangement.
He said: “Most people that I know and many of my family, they are not able to work and live together. It is actually really weird because it would seem like a lot of pressure. But it just feels natural and normal.”
In the same interview, Meghan was asked if there is “room for forgiveness” between her, her royal in-laws and her own family members.
She replied: “I think forgiveness is really important. It takes a lot more energy to not forgive. But it takes a lot of effort to forgive. I have really made an active effort, especially knowing that I can say anything.”