Expert says Prince Charles' loving gesture to Kate Middleton came as an insult to Prince Harry and wife Meghan Markle.
Paul's Cathedral, the royal family gathered in early June to celebrate the Queen's Thanksgiving. While key members of the fold paid tribute to the monarch, Prince Charles took a subtle swipe at Meghan after blowing a kiss on older daughter-in-law Kate Middleton.
Royal expert Neil Sr revealed on his YouTube channel that the action has forever changed Harry and Meghan's future in the monarchy.
Speaking of Charles' gesture, Mr Sean said: "According to a very good source, this is one of the things that Harry and Meghan feel very little about now.
"[It is] because of what Prince Charles did in the cathedral."
He continued: "In fact, some people are saying, [it's] the biggest humiliation I've received since she left, of course, and decided to become Megxit."
The royal expert continued: "As I've said many times before, you threw the gauntlet, you said all those things on TV.
"Prince Charles, the Queen, Prince William, [the] Duchess of Cambridge, however, Sophie Wessex, are entitled to react in any way they want no matter what happened first."
He added: "Prince Charles, Catherine, William, Harry and Meghan were really a bigger disgrace than this.
"I would just say it was an off-the-cuff thing that Prince Charles did and probably [he] never thought about it because they [William and Kate] were right there in front of him."
Mr Sean said: "[and] why should he, given what they have done to him.
"So fast forward, it looks like this particular minor could be one of the biggest talking points in Prince Harry's book".