The United Kingdom's Princess Kate was reportedly left "heartbroken" after she and Prince William were split over how to educate one of their children. 

A source told the website InTouch that the royal couple were divided about whether 10-year-old Prince George should attend Eton, the same exclusive boarding school that his father went to.

Princess said to worry that son will be bullied

"Kate long disagreed with her husband about sending him away, even though it’s tradition," the source was quoted as telling the website.

"Kate thinks sending him to such a stuffy, upper-crust institution goes against all of their efforts to modernize the monarchy," the source explained.

"Plus, she’ll miss George desperately. She and William argued about it for years, but he has finally won," the unnamed figure continued.

"But she’s still heartbroken. She was horribly bullied at her first boarding school, and can’t bear the thought of George suffering through that," the source added.

Source: Prince George "wants to be just like his father"

InTouch noted how "Eton is considered the most prestigious boarding school in the world," with a history dating back six centuries.

It recalled how William excelled during his time at the storied institution, managing to become captain of Eton's swim team as well as being elected as a prefect in the Eton Society.

However, the website also pointed out that William's younger brother, Prince Harry, is said to have been far less fond of his years there.

For his part, young George apparently wishes to join Eton's ranks, with the source remarking that he "wants to be just like his father."

Royal couple reportedly have "heated fights" with one another

InTouch's article was published just days after the release of "The Making of a Modern Monarch," a book written by royal author Robert Jobson.

According to the New York Post, Jobson alleges that William and Kate regularly have "heated fights," with the prince exhibiting "quite extreme mood swings, just as [his late mother Princess] Diana did."

"She could be your best friend one minute and the next your worst enemy," Jobson asserted, adding that her 41-year-old son has a "notably short fuse" and "can be a bit of a shouter when he loses it."

However, the writer insisted that the arguments are not one sided as both he and the princess  give "as good as they get if their disagreement results in raised voices."