I was just thinking about the whole "my surname is Sussex now" comment (I was chopping chilli and garlic, it was dull, in my defence!) and wondering how Megs hasn't grasped the intricacies of royal titles and surnames etc.
She must KNOW that her children's surnames are Mountbatten-Windsor, surely? And they (the kids) aren't the Duke and Duchess of Sussex, Harry and Megs are. So her surname simply isn't "Sussex" - it just isn't is it? Is she really that stupid that she thinks it is? Or is it?! My mind is boggling.