They had a bit of a fall-out, which was only resolved when Charles stepped in and asked William to make an effort.
"For me, the very first signs of potential future rifts between these two women came when they appeared on stage together with their husbands with the objective of re-branding them as some kind of "Fab Four" that would be working together on charitable causes", she told Mirror Online. "That's when the Cambridges invited the Sussexes to spend Christmas with them".
The Duchess of Cambridge is a doting mum-of-three, and has vowed to give her three children as normal a childhood as possible.
"They're doing well thank you, they're getting excited for Christmas time".
Meghan and Kate are very different people and their relationship still appears to look very regal and formal. Although Frogmore cottage reportedly needs some work to turn it back into the 10-bedroom luxury home it once was. Both Kate and William are doting parents, and although protective of their children's privacy, they often speak about them during their engagements. There is no acrimony'.
The Clooney's were among the celebrity guests who attended the royal wedding in May, and the Duke and Duchess also spent time with the Clooney's at their luxury residence on Lake Como after their nuptials, where they met the actor and human rights lawyer's toddler twins, Ella and Alexander.
The friendship between royal sisters-in-law, the Duchess of Cambridge and the Duchess of Sussex, has been called into question following an alleged feud about a bridesmaid fitting for Meghan and Harry's wedding in May 2018.
Kensington Palace confirmed that Harry and Meghan were moving out, but a spokeswoman explained that this was to facilitate preparations for having a baby.
Kensington Palace officially announced Markle's pregnancy in October, sharing that she is due in the spring of 2019.