John and Sherlock just got out of a very difficult case and when they get to the flat sherlock is exhausted so he just sits on the couch pretending not to need sleep when john sits next to him and scowls “sherlock, go to bed, now and don’t talk back to me you NEED sleep” sherlock is just too tired to answer anything else other than “yes daddy”. He doesn’t realize he did it until the next day which he spends mute and avoiding john’s gaze