In a similar vein, M (and H) would be astonished that George, Charlotte and Louis help set the table, clear away, wash up and load the dishwasher. As I explained to my DD, these are skills you need, along with others, if you are to make a good account of yourself as a house guest.
People give themselves away by their behaviour. In the 1990s, when I worked in the City, I had a private ranking system for the senior directors. Least respected, tosser category: European CEO (whining to me he didn't know how to find his clean shirts because his wife was away) and UK MD (walking right past the coat stand to his PA's desk, casting his raincoat across her desk and saying 'Hang that up, would you Barbara.' Most respected, human hero category: Group Chairman (returning at 6pm to the office for the birthday celebration of the longstanding corporate floor receptionist, a 60-something working class woman who had joined the company at 16, after he had had a 6am start to brief analysts on the full year results), European Something-Or-Other (having his PA call me to his office to thank me personally for writing a speech for him and asking me, with perfect courtesy, to increase the font size to huge, the only edit; a peer, old money, treated absolutely everyone well without fail).
I would expect M to be below H on my incipient Royal family scale, at the bottom with Andrew.