Prince Philip and Prince Charles
Queen Mother and Prince Philip were reportedly feuding over "sensitive" Prince Charles. Pictured: Prince Philip and Prince Charles listen to speeches before a statue of the Queen Elizabeth, The Queen Mother was unveiled on October 27, 2016 in Poundbury, England. Getty Images/Justin Tallis

Prince Philip and the Queen Mother reportedly had a disagreement over Prince Charles at one point.

The Prince of Wales and the Duke of Edinburg have always had a shaky father and son relationship. In fact, it came to a point when the Queen Mother had to come to Prince Charles' defense and protect him from his "alpha male father."

In Netflix's explosive documentary titled "The Royal House of Windsor," it was revealed that "not only did Charles have a remote relationship with his mother, he also had an alpha male father," (as quoted by Express).

One episode detailed how Prince Philip sent Prince Charles to Gordonstoun, his old school in Scotland, to toughen up the future king. The school is "anxious to develop character as well as intellect, to provide for the tough boy." However, this didn't sit well with the Queen Mother that led to the two senior royals' feud.

"The Queen Mother was wary of Prince Philip. She thought he bullied his son and failed to appreciate how sensitive he was," the narrator read.

Queen Mother intervened with Prince Philip's plan and insisted that they send Prince Charles to Eton, instead. However, the 97-year-old royal denied her request and went on and sent Prince Charles to Gordonstoun.

"He hated it, whenever he could, he escaped from school to stay with his grandmother," the narrator added.

The heir to the throne even begged his grandmother to take him out of school. Queen Mother refused but told Queen Elizabeth II's son that "she would help him find the strength to deal with his troubles."

The same documentary revealed that Queen Elizabeth II was not a warm and cozy mother to the second-in-line to the throne because she was busy with her role as a monarch and head of the Commonwealth. Queen Mother filled her absence, which explains why Prince Charles is much closer to his grandmother than his own mom. In fact, the Duke of Cornwall was devastated when Queen Mother died and couldn't help but recall their fun memories together.

"And I had dreaded, dreaded this moment. Above all, she saw the funny side in everything and we laughed until we cried. And oh, how I shall miss those laughs," Prince Charles said.

At the time, Queen Elizabeth II and Prince Philip reportedly doubt Prince Charles suitability as the next king. The Queen and the Duke of Edinburgh reportedly find their eldest son a "loose cannon" due to his short temper and zeal to make a mark with various initiatives that they "believe teetered dangerously on the brink of quackery."