A/N: So this is my first one shot for Supernatural. I'm writing a lengthy story, A Sky So Bright you should read it =]]. Let me know what you think, I love reviews, they make me all warm and fuzzy inside.

This is set in Season 2 Playthings, after Sam gets drunk and begs for Dean to be the one to kill him if he goes dark side.

Disclaimer: Neither Supernatural or Sam and Dean belong to me. If they did, I most certainly would never leave the bedroom. ;]]

"Dean please, you have to promise me." Sam begged and even though he was drunk Dean could see the genuine desperation in his little brothers' eyes. How could he deny him anything with that look in his eyes; that trusting, 'I know my big brother is going to take care of me' look in his eyes.

"I promise." Dean said.

"Thank you, thank you." Sam said as he grabbed Dean's face. Dean shoved at Sam's hands and then helped him lie down on the bed. Two minutes later and Sam was fast asleep.

Dean sat there and stared at his little brother, watching him sleep. He looked so young, so innocent; as if he hadn't been hunting monsters his entire life.

Dean, you're the only one who can do it.

What kind of crap was that? Dean thought. If there was anyone in the world who could not kill Sam, it was Dean. Dean had spent his entire life protecting Sam, making sure that he always came out alive. Dean had a ton of scars running along his body that he had gotten making sure Sammy was okay. And now the kid was asking him to kill him?

Dean, Dad told you to do it, you have to.

Who the hell cared what Dad had said? It should've never been asked of him. Kill his brother? Kill his only family left? Dad should've known better, should've known that there was no way in hell that Dean could do that. And now he had promised Sam he would.

Well, this was one promise Dean wouldn't…couldn't, keep.