Yes, Stratemann would be just the type to get misty-eyed about the King reminiscencing about his late mother, yet I don't recall him ever recording anything of the sort.

Man, these wives put up with a lot, didn't they?

They did indeed. Incidentally, it's of course also interesting and telling that Heinrich chooses to spend so much of his thirtieth birthday not with his boyfriend du jour (Kalckreuth, whom he had only just fallen for), or even with beloved brothers AW and Ferdinand, but with Lehndorff. (Spending the day with Mina is of course out of the question.)