Having Sherlock as a father isn't the most conventional thing.

You were born shortly before John moved into the apartment. And now, at the age of 5? You're one strange little thing..

You don't like other people much. Very reserved, except when you're around people you know. People you like. Sherlock, John, Lestrade, Mrs Hudson, etc etc..

You're very sweet then.. However, you show sighs of being similar to Sherlock. You're incredibly intelligent. You didn't say your first word until you were 4, revealing you could speak almost entire coherent sentences.

You choose not to.

To you, Sherlock is 'Dad'. Always dad or Dada, and he doesn't mind. He keeps it stoic, but it's clear you're his favourite person. However.. Tonight, something happened.

"Papa?"

You question in that small, curious voice of yours. Sherlock raises an eyebrow, glancing up. Thats a new name.

"Hm? Thats ne--"

"Papa."

He pauses when he sees that you aren't looking at him. You're looking at John.