A/N: I have never seen any fics based on the Hotchner brothers, who I really love. I love Aaron in the role of big brother, therefore I decided to write some. Please review if you would like me to carry on.

I'm not entirely sure on the age gap between them but I guessed it was about 7 years, as Hotch said in one episode he went to boarding school when Sean was in 1st Grade.
-Finally, I don't own any of the characters. All rights belong to the makers of the show.

"Sean! If you want to play baseball with us hurry up!" Aaron Hotchner shouted up the stairs. Sean had been begging to play with him and his friends for weeks, and after their mother's persuasion (and blackmailing of less TV time) Aaron promised to take him. Although he was already regretting it, they were supposed to be at the park nearly half an hour ago.

"I'm ready!" A small blonde haired boy came bounding down the stairs wearing full baseball gear, whilst carrying a ball and a bat.

"We don't need them" Aaron orders grabbing the bat and ball from his little brother's hand and throwing them on the floor "Get your jacket" He says before walking out the door leaving his brother to retrieve his coat then meet him outside.

"Aaron let's go!" Sean runs outside gently pushing his brother, who was a good foot taller than him. Aaron turns to his brother and sighs deeply "Sean I told you to get your jacket, now go get it"

"It's not that cold!" Sean whines in a very high tone.

"It will be later so go get it"

"No" Sean sulks standing in front of his brother, arms crossed and his bottom lip out.

"Sean" Aaron warns his brother, who was always up for an argument and who had an unlimited amount of energy. The worst combination.

Normally Aaron's best glare would have made Sean feel too uncomfortable and he would give in, but the kid was staying strong today.

"Fine then, I'll go without you" Aaron says before walking down their garden over to the gate.

"No! Wait!" Sean yells. He quickly runs inside, grabs his blue jacket and runs over to his brother who was waiting at the gate smirking "Come on then"

"Who are we going to play with Aaron?" Sean asks on their way to the park, which was a ten minute walk from their house.

"Jimmy, Greg and Eric"

"Greg doesn't like me" Sean smiles sadly. Aaron looks down at his brother, he might only be 7 but he was smart.

"Course he does Sean, everyone likes you" Aaron grins ruffling his brothers blonde curly hair.

"Not everyone"

"Well most people, anyway don't worry about it" He smiles softly at his little brother who smiles back. Neither of them looked much like each other. Besides the prominent cheek bones and athletic build they were completely different. Sean was energetic, bubbly and naïve. He had blonde curls with bright blue eyes. Whereas Aaron was responsible, intelligent and stubborn. His looks were the complete opposite as well, with his short dark hair and deep brown eyes.

Once they arrived at the park, Aaron saw his friends and waved at them before walking over, Sean following behind but keeping his distance.

"Finally Aaron! We've been waiting ages!" Greg shouts at his friend

"Yeah sorry guys, I had to wait for Sean" Aaron nods behind him at his brother, who was now standing behind him.

"You okay Seany?" Eric asks the young boy. Sean nods and smiles. He likes Eric the best, he had known him his entire life because he and Aaron had been best friends since they were in pre-school.

"Sean why don't you go and field over there" Aaron smiles at his brother who nods understandingly

"Way over there" Greg snarls at the small boy. Aaron knew Greg wasn't a fan of Sean because they were 14 and he was 7, but Greg had never purposely hurt him so it was okay.

The game was underway and everyone besides Sean was having a good time. It's like they had all forgotten about him. Aaron, Jimmy and Eric were too engrossed in the game to notice him and Greg just didn't care.

Once another 20 minutes had passed and no-one stopped to even speak to Sean he decided to go home and play in the garden with his own friends from down the street. He walked straight past his brother and he still didn't realise he was gone. Sean wasn't supposed to cross the road to the other side of their street without Aaron but it looked safe enough.

Sean stepped out in to the side of the road, just as he did a car came tearing round the corner. Sean stopped dead in his tracks and screamed.

Aaron heard the deafening scream and he recognised it. He scanned the park but his brother was no-where in site.

"Where the hell is Sean?" Aaron asks his friends panicking

"Sean! Sean!" He shouts repeatedly looking in every direction

"Oh well, let's just carry on" Greg suggests

"Shut up Greg! That's his little brother!" Eric narrows his eyes at the boy

"Aaron, isn't that Sean over there in the road?" Jimmy asks worriedly

"Oh my god" Aaron whispers. He ran to the road as fast as he could, all his cross country practice paying off. Once he got there he was relieved to see Sean was still standing but he was crying. The woman whose car nearly hit him was comforting him.

"Sean! What are you doing?! Don't run away from me!" Aaron shouts at his brother who looked up at him with tears pouring down his face "Oh buddy, come here" Aaron smiles softly picking up his small brother and holding him. He turns to the women who was helping his brother "I'm so sorry he ran out in front of you and thank you for looking after him"

"It's no problem, just keep an eye on him next time, because he might not be so lucky then" She smiles before getting back in her car.

Aaron carried his brother home, neither of them saying anything. He carried him up the stairs and into his room before placing him gently on his bed. Sean was much calmer now and only occasionally sniffed. Aaron kneeled down in front of him so they were eye-to-eye and put his hands on his brother's shoulders.

"Sean, don't ever do anything like that again, if you want to go tell me and I'll take you"

"You were ignoring me" Sean replies quietly rubbing at his eyes

"I know buddy, I know, and I'm sorry but that doesn't mean you can just go home by yourself"

"I'm sorry too"

"Next weekend, I'll take you again, just me, you and Eric, yeah?" Aaron asks and Sean nods enthusiastically

"Alright then…Sean where is your jacket?"

"I left it at the park"

"Brilliant, I'll go and get it, stay here" Aaron orders

"No I left it on purpose, that way I don't have to always bring it with me" Sean smiles proudly and Aaron can't help but smile at his brother's innocence.

"Okay then" He laughs but makes a mental note to retrieve the jacket later on that night.