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.”
“You’re wet at a crime scene, Sherlock. Do explain how it’s different.”
“Bathrooms slow me down.” Sherlock grumbles, aiming for haughty and missing. His cheeks flushed as Daddy inspects his sodden padding.
Sadie: “So does stopping for a full change,” John replies, hooking a finger in the front of his nappy and pulling it out. “What, were you just going to marinade in yourself until we got back? Was that your plan?” he asked, the corner of his mouth turning up sarcastically.