Sherlock was just walking out of the loo. "John!" He called, thinking he was still in the living room, when he almost ran into the man.

"Oh. John. Sorry." He spoke in a regular tone. " I think I've made some plans. I'll need to call an architect to get them on paper. Hopefully we can get things done before the baby decides to get here. "I'm going to go look up architects. I'm sure my dear brother can suggest someone." Sherlock is used to calling Mycroft his brother to other humans, so he usually says it even in private so he doesn't accidentally call him his sire, which he actually is.