I thought I saw Kate suppress a smile, like she was thinking, oh no, this ones going to be on twitter.
I thought that a number of times over the weekend when the adults were having to deal with understandably bored children! In the grainy photo where she's separating Charlotte and Mia Tindall who were larking about in front of a window she was probably thinking Oh God, all the saintly mothers will be on Mumsnet about this!
All the children behaved very well generally throughout, a few seconds shouldn't be a reason for the keyboard psychologists to tear a little boy apart.