John crowds him into a closet at the Met after they are done under the guise of checking his nappy.
Sadie: Sherlock being huffy and indignant at first, protesting that he was ‘only in a rush to leave’ and had forgotten to take it off.
John knows that’s a fib though because Sherlock remembered to take off his bee tshirt before putting on his suit.
Sadie: “…That’s completely different, John.”