The insider allegedly adds, "During a screaming match over money at their London home, Clarence House, Camilla raged.
"As Charles stood in stunned silence, Camilla hissed, 'If you don't pay up, I'll destroy you and your family."
As previously reported, sources claim Meghan confronted the Duchess of Cornwall over her "continuous snide comments" on the royal baby.
Now a fed-up Queen Elizabeth has immediately "issued an unprecedented royal decree ending her son's 13-year marriage", GLOBE outrageously reports.
"Her Majesty's had enough of Camilla's scheming and back-stabbing," the insider claims.
"By ordering the immediate divorce, she expected Charles to be officially free of his wife."
"But Camilla's new threats have thrown them into chaos!"
To make matters worse, an explosive new biography confirms Charles wanted to call of his 1981 wedding to Diana.
"Charles felt the marriage was doomed," says author Robert Jobson in Charles At Seventy: Thoughts, Hopes and Dreams.
"He wept to friends 'I desperately wanted out'."
The Royal Family is yet to respond to GLOBE's report.