prettybirdy979

Title: Thicker than Water,
Fandom: Cabin Pressure, Sherlock
Gene: Crossover, Drama, Hurt/Comfort, Kid-fic, Fluff
Character/s: Martin, Sherlock, John,
Rating: PG-13
Summary: Sherlock's favourite brother hasn't always been there, but he's been there when it counts. For that matter, so has Sherlock.
Warnings: Mentions of Drug abuse in earlier chapters...
Notes: For a prompt on the kinkmeme.

I'm back (Harry Potter 7- Amazing btw!!!!) ! Not sure if this lives up to people's expectations, but I hope you like!

Thanks to

elvendork_lee for betaing!

John wasn’t sure what was odder, how he spent the night or who he spent it with. Coming home he had expected a night of chases, death-defying stunts and quite possibly no sleep.

Instead he had spent the night watching Sherlock interact with his brother. The differences in the way Martin and Sherlock interacted when compared to how Mycroft and Sherlock interacted were striking. Every discussion between Mycroft and Sherlock was a battle, part of a carefully waged war. Every word had a double or triple meaning and no thought went unnoticed.

With Martin, there was none of that. With Martin, Sherlock was by far the most relaxed John had ever seen. And Martin seemed to adore his older brother, complimenting him as much as, if not more than John did. Sherlock had ordered in Thai from one of the many restaurants that owed him a favour and Martin had produced a bottle of wine from his bag that had been a ‘gift’ from his employer. For some reason that had made Sherlock start giggling and after a moment Martin had joined in.

At first Martin had stumbled over his words when talking to John, had restated everything and acted a complete fool. Finally Sherlock had snapped from his position beside Martin on the sofa.

“For goodness sake Martin, he likes you! You don’t have to try for a good impression and if you were you failed half an hour ago.”

Martin was taken back but then he smiled shyly and apologised. After that, he became more animated, talking about his beloved planes with great enthusiasm. John had found himself almost crying with laughter as Martin relayed tales of his flights with MJN- even Sherlock had laughed at the story of the Douz escape involving a fire truck and the Scottish Cricket team.

Currently Martin was asleep, his head resting gently on Sherlock’s shoulder. Sherlock was still recounting one of his earlier cases to John and seemed to be ignoring his sleeping brother. But every so often, he would briefly glance at the head on his shoulder before looking at John again.

“You’re very alike, aren’t you?” John suddenly said.

Sherlock frowned. “Are you going to start mimicking Anderson and state the obvious, John?”

“No, not just in appearance. In personality. You both have a single minded determination to do something, and you both adore talking about it. He may not be as smart as you, but he’s very much like you…just with an understanding of personal relationships, if not a lot of ability in creating them.”

Sherlock blinked. “I’ve…never thought of it that way.” He ran his hand over Martin’s curls without thought. “He’s just…Martin. The single constant in my life, who never acts like I expect.”

“You adore him, don’t you?”

Sherlock smiled. “See John. You are getting better at making deductions.”

********

Martin awoke to find himself in a strange bed. He was used to sleeping in cheap hotel and therefore strange beds but… Normally they weren’t this comfortable. Curling up a bit more, he tried to sink more into sleep.

“You’re not looking after yourself.” A familiar voice cut through his doze and Martin sat up to meet Sherlock’s eyes. It was then it clicked- he was staying with Sherlock and by the looks of it had just spent the night in Sherlock’s bed. Sherlock was now sitting on the edge of his bed, his eyes narrowed and expression firm.

“You’re one to talk.” Martin snapped back once he processed what Sherlock had said. “You never take care of yourself.”

“It’s different, it’s necessary. I can’t think while digesting. You, on the other hand, can’t afford to care for yourself.”

“I get by.” Martin lowered his graze, unable to meet Sherlock’s eyes.

“You shouldn’t be just ‘getting by’.”

“I don’t have any other option Sherlock. I can’t…won’t leave MJN and they can’t afford to pay me. The only way I can make money on my van is to be as cheap as I am-“

“Which is never going to help you.”

Martin suddenly started yelling. “What else can I do Sherlock?! I’m finally living my dream; I just have to make it work somehow.” He took a deep breath. “Sorry, Sherlock. It’s just-“

Sherlock cut Martin off as he pulled his brother into his arms. “I know Martin.” Silently Sherlock vowed to help his brother somehow. I didn’t realise how badly off you were Martin. I’m sorry for that…

“Tea?” A voice from the doorway spooked both brothers and they broke apart as they turned to see John standing there, holding a tea cup and a stuffed plane.

“Oh and this was on the sofa, is it yours Martin?”

Martin stared at Planey in complete shock before he began to smirk. “No, that hasn’t been mine since I was seven.”

John blinked, then began to smile as the implications of what Martin was saying sunk in. “This is yours, Sherlock?”

A stormy look on his face, Sherlock got up and brushed past John, liberating Planey from his flatmate’s grasp as he did. Ten seconds later the front door slams as Sherlock leaves on one of his mysterious errands.

“He’s not heartless, you know. He does actually care about y-people. He cares about people but just never shows, people always think he doesn’t-” Martin suddenly said. John met his eyes with a smile.

John held up a hand to stop Martin speaking. “I know Martin. I know.”

“Oh. That’s good then. I’m glad-“

John laughs. “My God, you are like your brother. It’s…uncanny sometimes.”

Martin looks flattered. “Really?”

John smiles kindly. “Yes. Now, eggs and bacon okay for breakfast? I want to eat them before your brother gets it into his head to experiment on them.”

It sounds like a feast to Martin. “Yes, those are perfectly fine. Say, does Sherlock still put body parts in the fridge? That was probably the worst part of staying with him…”

John finishes Martin’s statement. “The surprises in the fridge? Yeah…bit cat like really.” Martin smiles as he moves to stand beside John. John smiles back.

“So, Martin how exactly did Sherlock end up with your stuffed plane?”

Together they sit down to breakfast, swapping increasing outrageous stories about Sherlock until Martin has to leave for the airport.

Planey sits on the sofa for the rest of the day.

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