Harry allegedly accused his brother William and sister-in-law Kate of not supporting Meghan Markle in a “showdown” at Kensington Palace.
Meghan, 38, kept a “stony silence” during Harry’s speech after William and Kate’s children had gone to bed.
The Duke and Duchess of Cambridge were also said to have been taken by surprise by Harry’s speech.
But it is said the Cambridges then assured Harry they were happy to offer more support his Duchess of Sussex wife, and Kate even brought flowers to Harry and Meghan’s home the next day.
The Duchess of Cambridge also offered to go to Wimbledon with her new sister-in-law following Harry’s “riot act” speech last year, according to the Mail on Sunday, citing unnamed sources.
The report added that some sources claim the two families are continuing to drift apart. This is despite Meghan and Kate attending Wimbledon together earlier this summer.
A royal source told Mirror Online the claims were “nonsense”.
Daily Star Online has contacted Buckingham Palace and Kensington Palace for comment.
Claims of a split between the Cambridges and Sussexes were sparked last year when Harry and Meghan announced they were moving out of Kensington Palace.
The duo moved in to their new Frogmore Cottage home in spring just before Meghan gave birth to their son Archie.
The couples then split households with Meghan and Harry’s office leaving Kensington Palace and moving in to Buckingham Palace.
And finally Harry and Meghan split from William and Kate’s charity to start their own, while also opening their own Instagram account, which now has 9.3million followers.