"They talk and text regularly, they have more in common, and Kate has wanted to make sure Meghan has felt welcome into the family."
Since the birth of baby Archie, Meghan has been seen out at various events, and is often joined by Kate.
The Duchesses were both pictured earlier this month supporting their husbands as the Princes played in a charity polo match.
Kate and Meghan then visited Wimbledon to watch the tennis together, and were spotted laughing and giggling as they sat in the Royal Box as they watched the Women's Tennis Final.
Meghan and Harry's decision to move over 40km away from Kensington Palace initially ignited the royal rift rumours.
Then in June, the Sussexes fuelled the rumours further when they split from the Royal Foundation charity shared with William and Kate.