GLOBE's palace spy notes that when the Duke and Duchess of Sussex told the Royal Family the happy baby news, Camilla began "making snide comments."
Meghan wasn't having it, GLOBE's spies add.
"She raised her voice saying Camilla tried to destroy her romance with Harry from day one!"
Earlier this month, it was reported that Prince Charles had be "hit by divorce demands by his wife" Camilla who was calling time on their 13-year marriage.
GLOBE sensationally reported that the Duchess of Cornwall was "demanding a fast-track divorce" which left both Charles, and the palace, reeling.
An insider dished , "Camilla knows enough dirty secrets to bring down the monarchy - and she's angry enough to do it."
According to the publication's bombshell report, the royal pair's blowout erupted following 71-year-old Camilla's return home from royal engagements, with GLOBE alleging the future King of England was blindsided.
The US tabloid added that Camilla's previous blowouts with the Royal Family were partly to blame for the new split.
"The royals are convinced Camilla is nuts!" a source says.
The insider added, "She's been fighting the entire family."
"There are frantic talks going on behind closed doors at Buckingham Palace, trying to negotiate some sort of face-saving compromise."
"But, you know Camilla will play hardball.
"There's nothing worse than a wannabe queen scorned, and the royals are bracing for one of the nastiest - and most expensive - royal bust ups in history."
The Royal Family is yet to respond to GLOBE's claims.