Meghan Markle and Prince Harry were driven out by Prince William's "bullying" attitude, a royal expert claims.
Andrew Morton, author of Meghan: A Hollywood Princess, further claimed that Kate's "coolness" added to the brothers "Cain and Abel" epic fallout.
He wrote: "Far from abandoning Meghan, the Palace had a team which spent ‘hundreds of hours monitoring social media accounts' and ‘violent threats were reported to the police."
However, he says it was William and Kate's attitude towards Meghan and Harry that reportedly caused the rift.
He wrote: "The Duchess of Cambridge’s coolness towards Meghan, and William’s alleged bullying contributed to a devastating ‘Cain and Abel’ fallout between the brothers.
"Harry was the ‘prime mover’ in souring relations between the Sussexes and the Royal Family, but it was Meghan who ‘took the hit'."
It has always been strongly denied that William bullied his family members.
Last year, the brothers said they were "deeply, deeply unhappy" about bullying claims.
Prince Harry was reported to have said he felt pushed out by his brother, but the pair spoke out blasting the "offensive" claims.
The rare joint statement read: "Despite clear denials, a false story ran in a UK newspaper today speculating about the relationship between The Duke of Sussex and The Duke of Cambridge.
“For brothers who care so deeply about the issues surrounding mental health, the use of inflammatory language in this way is offensive and potentially harmful.”
Royal author Robert Lacey recently claimed the Duke of Cambridge "threw Harry out" in a row over the bullying claims against Meghan.
He has alleged Wills was furious after learning of a complaint made against the Duchess of Sussex by her former communications secretary.
But when he called his younger brother, Harry reportedly hung up on him.
And it's claimed the brothers' fury was so great, William split his household from Harry's all together, the Times reported.
A source friendly with the Duke of Sussex told Lacey: "William threw Harry out."Read More Read More