I bet she is the reason Harry dropped the ‘just call me Harry’ spiel after 5seconds. That would have been a huge blow to their marriage, the very raison d'être of the whole charade.
I think she is very insecure about Harry, it’s definitely not the love story she wants people to believe, he is probably compliant and she confuses that for love, but he generally looks disinterested or resentful when he is with her.
She doesn’t seem to much like her mother either, what a surprise !