That would only be relevant if Charles were to become king while you were still alive your not so pleasant to peasants when your blackmail overlord tells you Majesty. Otherwise you would be past caring what the Duchess of Cornwall's new title is? Just hurry up now, here's your speech. "One is getting very old and decrepit now and one is having trouble remembering the name of the person one needs to persecute, one hasn't carried out a public duty for Months now and one needs advised as to what day it is, the only proper thing to do is to hand one's hat over to Charles and put one's feet up for a while!"