No one else in 1769 is the Queen of Sweden who is thinking loudly about a coup again and has to be talked out of it so Russia doesn't invade and Prussia by virtue of its alliance with Russia also has to invade. I can't prove it, but Fritz does have motive to sweettalk Ulrike that year. If it were two years later, when her son is King and Ulrike has lost all her political influence, then I would qualify it as an entirely private gesture. But not in 1769.
Re: Pesne painting
No one else in 1769 is the Queen of Sweden who is thinking loudly about a coup again and has to be talked out of it so Russia doesn't invade and Prussia by virtue of its alliance with Russia also has to invade. I can't prove it, but Fritz does have motive to sweettalk Ulrike that year. If it were two years later, when her son is King and Ulrike has lost all her political influence, then I would qualify it as an entirely private gesture. But not in 1769.