I think Waity and Willnot deserve the benefit of the doubt with Charlotte. She is only 3 and is still learning how to speak and construct sentences and one of the ways they do this is by vocalising observations, but they are still too young to know you shouldn’t say everything you notice. It is why kids that age are great at embarrassing their parents with comments like “Mommy she’s really fat” while pointing at someone on the train. My friend’s daughter was born the same day as Charlotte (my friend jokes she got upstaged) and that story is something she did about a month ago. She is not a badly raised child at all, she is just in a developmentally normal stage of childhood where they are curious about the world and want to vocalise things, but don’t have the understanding of social graces needed to know when to keep their observations to themselves. Charlotte has noticed they are not coming and has said it, but is still too young to understand it is a little rude.
As for Waity, there is a lot I can say about her but I do think her enjoyment of motherhood and her love for her children is very genuine, so I’m glad that with all the craziness these kids will grow up with, they have that love in the family home. I don’t see Kate and Willnot allowing them to be sent away at age 8, but I could see them going to boarding school as teenagers - given HM’s age, by that point, Waity and Willnot will have Chuck and Camilla’s schedule. I am sure there are options like Kate has for weekly boarding - where they can be at home on the weekends.