She claimed: “There have been rumours that William and his father haven’t always seen eye to eye.
“But with Kate present the mood between the two men does seem to lighten.
“While the two men point and laugh open-mouthed to suggest there’s some kind of banter going on between them, Kate’s polite attention to Charles and her appreciative smiles as he chuckles suggests she might have mended a few bridges between them over the years.”
Analysing the body language of the royals, Judi suggested the Duchess has helped bring the family closer together.
She added: “Kate’s role in Prince Charles’s life appears to be that of a catalyst rather than a friend or kindred spirit.
“The secret reason why he so often looks happy and fun-loving in Kate’s company might be more to do with the fact that she forms an integral buffer or air-bag role in the relationship triangle that includes his son William.”
More recently, the body language between Kate and Charles may have hinted at a close relationship behind closed doors.
“It usually takes niece Zara Tindall to break through Charles’s public reserve with hugs and laughter.
“However, the way that Kate performed her hug with ease and confidence suggested she and Charles might have grown a warmer relationship than expected behind the scenes.
“Previous photos of the pair here do show a theme of unexpected rapport and affection between them.
“What makes this even more surprising is that William’s relationship with his father has been uneasy at times and these displays of affection from Kate look as though she is taking the lead rather than following her husband’s.”
The royal line of succession – who outranks who?
The line of succession to the British throne dictates the order in which each member of the Royal Family would ascend to the throne.
It is also seen as a ranking of importance with the head of the line, the Queen, taking the place of ruler.
Older children come before younger children. Traditionally boys came before girls, but this law was changed on March 26, 2015 before the birth of Prince William’s first child.
Incredibly, Catholics are still excluded from the line of succession, as are children born outside of wedlock.
The royals, who usually stick to a strict protocol when appearing in public, often arrive at events in ascending order of importance, with the most important royal arriving last.
Prince Charles, 72, is currently first-in-line to the British throne, followed by Prince William, 39, his oldest son.
Then comes Prince William’s children, George, seven, Charlotte, six, and Louis, three, and they are followed by Prince Harry, 36. Prince Harry is succeeded by his son Archie Harrison, born in May 2019.