"And when I said that I meant that you have to do the more dangerous experiments somewhere else as well," said John nodding decisively and Mrs. Hudson was nodding her head in agreement to that and as to what else was said.

"Where?" asked Sherlock and he didn't sound like he was sulking. He didn't.

"Mycroft's house?" said John, making it sound like a question.

Sherlock's lips twitched upwards and he said, "Brilliant, John!"

"I was kidding," said John flatly though his lips twitched upwards as well.

"Nonsense," said Sherlock and he started making plans on what experiments he was going to perform first.
______________________________________

John looked at Mycroft and said, "You and Sherlock tend to forget important pieces of information sometimes."

Sherlock looked disgusted and said, "Don't put me in the same class as Mycroft."

"You'll have to acknowledge that you're brothers one day," replied John.

"We do once a year on Christmas for Mummy's sake," replied Mycroft, also looking insulted.

John sighed. He should have known he would never win an argument, especially against both of them at the same time.
_

____________________________________

"Who am I texting and whats the message?" John asked typing the passcode.

"Mycroft. Tell him its a code blue 573-41."

"And this means...?"

"Sherlock has somehow found himself in charge of a small child and has no idea what to do about them. Contact social services." Sherlock explained before adding "Oh, and tell him the address will you. It makes him look like less of a stalker when he shows up."

John sighed. "And why, Sherlock, is there a code name for this?"

"It's Mycroft." was the only answer John got to that question before Sherlock spoke up again.
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If Sherlock were a lesser man, he would have winced at John's bravery/stupidity. The only rule of Mycroft's he followed (mostly because it had gone unspoken and agreed upon between them) that no matter how low the insults get, never state that someone outside of the Holmeses could ever match or (Merlin forbid) surpass Mycroft in anyway.