Royal author Tom Quinn said Kate was “horrified” as Meghan railed against Palace staff. Speaking to the Daily Star, Quinn said the protest to “trample” on a staff member left Kate shocked.
He added that speaking to experts has led him to believe that the incident was the start of a “rift” between the Sussex and Cambridges.
The royal expert, who wrote the Royal book on Kensington Palace: An intimate memory of Queen Mary to Meghan Markle, said the situation even led them to try to avoid themselves as their relationship became “icy.”
Quinn said, “After a couple of incidents, the incident of stepping on my feet and coming across one of the people who worked for Kate, there was kind of Icy because, as I understand from my contacts, Harry felt that Meghan was being judged harshly.
“She is new to the Royal Family, you have to take into account the fact that sometimes she is going to be upset, that she is not going to understand, maybe she may have tantrums.”
“Inevitably, Harry backed Meghan and that caused a small crack.
“Some of this is well known to William, so when you have the two couples think a little bit that the other couple is difficult, you have a kind of freeze that develops and they try to avoid each other.
“They had all been part of a charity created by William and Kate, but Harry and Meghan also parted ways, and parted ways.
“That was such an obvious sign that things were not going well.
“So it was really just those initial incidents, so they were ignored because they didn’t want it to happen anymore.”
Rumors of a disagreement between the couples increased when Meghan and Harry unexpectedly announced that they were giving up their duties as members of royalty earlier this year.
The Sussexes then moved to Los Angeles after spending a short time in Canada and have not returned to the UK since then.
Since then, William and Kate have parted ways with the Royal Foundation, a charitable organization they shared with Harry and Meghan, when the Sussex established their organization called Archewell.
However, Quinn said Meghan and Kate had intentions to become friends, but expectations about them put too much pressure on them.
Quinn said: “Initially I think both Kate and Meghan thought they could become very good friends.
Then there was this trampling incident, the screaming at the servant.
He added: “Then the frost. It’s a big pity.
“The sad thing is not that they didn’t become friends, but that, in a way, the biggest shame is that they were under pressure to become good friends, and why should they become good friends?
“They only come together when Kate marries William and Meghan with Harry.
“I think they also felt there was a lot of pressure on them, so they were terrified.
“Apparently, when they went to Wimbledon and sat next to each other, during the initial period before they fell, and there were jokes about ‘we must be very careful to smile at each other all the time or the press will think that I I have fallen
“If you look at the shots, they make an effort to smile and get closer to each other.”
“But that was in the initial period when they put on a good show, but even in that early period they were two very different people and it is difficult if two people have nothing in common other than the fact that they are both members of for the company, it is very difficult for them. “
Express.co.uk has contacted Buckingham Palace for comment.