When Sherlock walked in Mycroft was stood with his back to the door.

"Look Sherlock I appreciate the fact that it was probably for a case but
you need to not threaten social services with me." He turned round and
looked at Sherlock.

"It wasn't a case Mycroft." Sherlock huffed.

"Then why on earth did you..." He was cut off with the sight of John
walking in with a little boy on his shoulders.

"Oh and that, dear John, is uncle Mycroft." John said laughing at
Mycroft's distraught face.

"Is it daddy's brother or yours?"

"It's daddy's. come on now let's get you down my shoulder is starting to
hurt."

When Sherlock heard this he put the bag down and pulled John off his shoulders
and placed him down on the floor but held his hand.

Mycroft spoke "well... I... Um... Will be going now."

John spoke "yeah if you want."

Sherlock stopped Mycroft before he left "no one will know of this. No one
not even mummy I shall tell them of my own accord... Ok?"

"Don't worry I won't... See you uh soon?" And he walked out.