A/N: Okay, yes the Broadway streak is temporarily broken. Haha. This one is a complete AU, and kind of a version of things I've wanted to explore a bit as odd as it seems. I figure a two shot is as good a starting point as ever. Barry and Caitlin as siblings. I kind of have a bit of a history, (not that any of them have really seen the light of day) of exploring different versions of dynamics. I was listening to the song Brother, and this little germ was born.

Brother (NeedtoBreathe ft Gavin Degraw) ( Barry/Caitlin siblings, Cisco) Part 1

It had been almost nine months, and several visits from Iris and Joe later, there had been no response from either the young man or the young doctor in charge of his care.

Every time Barry had gotten hurt when they were kids, Caitlin and Iris had been able to patch him up: Caitlin with her makeshift first aid kit scrapped together from supplies stolen from the school nurse and Joe's medicine cabinet, and Iris with her usual hugs, stories and jokes. It would work without fail a lot of the time with Caitlin's younger brother soon on his way to recovery and back to causing trouble the next day.

Then she'd left for college, returning a year and a half ago in order to begin an internship at STAR Labs, communication happening mostly through video calls and email, and she finds out in a series of novel length texts from Iris that Barry got struck by lightning. Of course her co-workers have no way of knowing that the John Doe struck by lightning is her younger brother. She's perfected her professionalism in a way that's almost mechanical, and yet Dr. Wells' curiosity cuts straight through her, a protective instinct flooding her in a way that causes her to snap, and has probably cost her her position.

"Cait…" A gentle knock on the door of the medbay, which stupidly she's left open as she sits by Barry's bedside in the early hours. "What are you still doing here?" It's Cisco, the lab's mechanical engineer, and one of her best friends.

"Hey Cisco…" Her voice comes out a sigh as she forces herself to move in order to check Barry's vitals, not that she hasn't a million times already, but she needed a reason to be here that wouldn't look like the plot from While You Were Sleeping.

"Still no change?" Cisco looks from the man in the coma to his friend. "Man that's awful."

"But not unheard of." Caitlin forces herself to the role of the pragmatist as difficult as it is.

"Yeah, but come on...you saw Iris earlier today. It can't be easy."

"No…" Caitlin chokes back tears.

"Hey...what's wrong?" Cisco notices the change in his friend immediately, the hitch in her voice.

And it all comes out. She's expected to be touted as crazy, taken straight to Dr. Wells to have her head examined, but all he does is look at her with the most serious expression on his face, then to Barry.

"I can see the resemblance."

She can't help it. She laughs, because that is the last thing that she's ever heard when it comes to her and her brother. Sure they have their similarities, but all in all they are on opposite poles, but for now, the fact that Cisco understands. That in itself is enough.

She brushes her hand against her brother's, and is shocked to see the slight twitch.

A/N: So, thoughts?