With the coronation of King Charles III less than a month away, a new book about the ascendant monarch has emerged suggesting that a key reason for his strained relationship with second son Prince Harry is his unwillingness to indefinitely bankroll Meghan Markle, as the Daily Mail reports.

Robert Jobson's forthcoming release entitled Our King: Charles III – The Man And The Monarch Revealed offers novel insights into the royals, including the familial rifts that developed after the arrival of the American actress who would eventually become the Duchess of Sussex.

Harry's fury

The difficulties began according to Jobson, when Harry – now known as the Duke of Sussex – approached his father, then the Prince of Wales, to announce his decision to marry Markle.

Harry's brother William evinced concern over the idea, reportedly asking, “Are you sure, Harold?”

It was then that Charles made it clear that he would not be able to cover expenses for Meghan in addition to those incurred by his own wife, Camilla, as well as William and his family.

Jobson claims that the conversation left Harry “infuriated.”

Tensions escalate

According to the author, in the months and weeks leading up to Harry and Meghan's 2018 wedding, a number of incidents occurred which, in Harry's mind, indicated a growing hostility toward his bride on the part of his closest family members, despite the fact that the couple was afforded a lavish ceremony in which Charles himself walked his soon-to-be daughter-in-law down the aisle.

Unpleasant interactions between Meghan and William's wife, Catherine, only added fuel to the fire of Harry's rage, with the pair ultimately deciding to withdraw as working members of the royal family and decamp for America.

It was after their self-imposed exile in the United States that the Sussexes began embarking on a campaign of incendiary accusations against the royals that included allegations of racism made during what turned out to be the final years of life for Queen Elizabeth II and her husband, the Duke of Edinburgh.

In the wake of an interview the Sussexes gave to Oprah Winfrey, Jobson claims, Charles and William made a joint decision that they would no longer meet with Harry alone out of concerns that their discussions would not be kept in confidence and that he could not be trusted.

Queen's frustration

According to Jobson's book, the difficulties between Charles and Harry even spilled over to affect the late Queen Elizabeth, who was, at least for a while, drawn into their battles.

Jobson notes that after his move to America, Harry continued to place telephone calls to his grandmother, but those chats did not always sit well with the monarch, who, according to a source, found the discussions “quite difficult and wearisome. She didn't want to interfere in the father/son relationship and would urge him to speak to his father” about the grievances he continually raised.

Queen Elizabeth is said by Jobson to have deemed the Sussexes' conduct with regard to the family “quite mad” and opined that Harry's blind devotion to Meghan “clouded his judgment.”

After Charles himself stopped accepting Harry's calls due to his coarse language and requests for money, the Queen reportedly asked why he did not simply acquiesce, to which her son answered that he was not a bank.

Coronation conundrum

As the Mail has reported separately, the divisions between Harry and his father will be on full display next month during the coronation festivities in London, with Buckingham Palace already having made it clear that the Sussexes will not be permitted to join other family members for the traditional balcony appearance following a procession from Westminster Abbey.

The honor will be, per Charles' reported wishes, reserved only for those considered to be “working royals,” a list that includes Queen Camilla, William and Catherine, Princess Anne, the Duke and Duchess of Edinburgh, and the Duke and Duchess of Glouster, according to the U.K.'s Metro.

Notably, Harry and Meghan have reportedly not yet informed the Palace of whether they will even attend the historic May 6 event, a fact that, according to the Mail, has caused no shortage of frustration among staff attempting to finalize plans for “security, cars, and other logistical matters.”

Another insider told GB News that Harry's stubborn silence has exasperated William, saying, “Relations have never been this bad, and he feels like Harry is just stringing it out to try and be difficult, frankly.” Whether his actions also put reconciliation with Charles further out of reach is something that remains to be seen.