I don't think there's any rift between Kate and Meghan, although the press are keen to generate one and to constantly compare one to the other.
They are totally different women who, like many in-laws, jog along as best they can even though they have little in common. Perhaps they don't even like one another but Kate, certainly, is too well-mannered to let it show.
The brothers will surely have fallen out with each other at times over the years as families do. I hate all this comparison in the media, even with comments from body language so-called experts, trying to drum up some interest. You can take a one-off photo and read something into it just because someone is looking in the opposite direction. It's nonsense. But since drones have stopped flying over Gatwick, there is nothing else to write about!!