Meghan Markle and Prince Harry opened up about the ups and downs of royal life in "Harry & Meghan: An African Journey." Their decision to be candid about their struggles doesn't seem to be sitting well with some other members of the British royal family though -- more specifically, Harry's brother, Prince William.

During the documentary, Prince Harry confirmed the longstanding rumor that he and William aren't on the best of terms. However, it's not Harry's comments about their relationship that will apparently make him furious, but Meghan's.

The Duchess of Sussex revealed during an interview with Tom Bradby that life has been challenging enough, even without the added stress of seemingly non-stop negative press.

"Especially as a woman, it's really -- it's a lot," Meghan explained. "So you add this on top of just trying to be a new mom or trying to be a newlywed. And also thank you for asking, because not many people have asked if I'm OK. But it's a very real thing to be going through behind-the-scenes."

According to an unidentified source, it was the 38-year-old's comment that no one has checked on her that apparently will infuriate the future King of England.

"Telling a reporter 'no one asks if I’m okay' is a slap in the face of the royal family and British public," the source revealed to Radar Online. "It makes them look unfeeling and brings back terrible memories of the way Diana tried to portray them. They have seen this movie before and won’t let it play again."

"Saying what she said will enrage William," the source continued. "He sees this and Meghan as all very damaging to the royal family — a family that one day he will be the head of."

Prince William Meghan Markle and Prince Harry
Prince William, Meghan Markle and Prince Harry attend an Anzac Day service at Westminster Abbey on April 25, 2018 in London. Getty Images/Eddie Mulholland