Castiel is my little brother.

He came with me when I ran away from Heaven. He became a Trickster just as I did. He took part in my pranks on the humans, dropping karma on them in our own twisted sense of justice.

I took care of him. I healed him when he was hurt. I comforted him if a hunter went too far. I laughed with him. I played with him. I'm the one who taught him how to fly. All these millennia, I'm the one he's looked up to. I'm his big brother. I take care of him. He was mine.

And then, you came along.

Dean Winchester. The drop out with six bucks to his name. The big brother. I don't know what Castiel sees in you. You flirt with women you don't even know, you drive your younger brother crazy, you listen to crap music, and you're a general pain in the ass. And I thought I could be annoying.

So I messed with you. I drove you and your little brother over the edge, neck-deep in stress and annoyance to a point where you were ready to rip each other's throats out. I was sure you were never going to find us.

But then you did. So Castiel and I faked our own deaths and high-tailed it out of there.

But of course you had to show up again, didn't you?

So I trapped you in a time-loop, killing you over and over again and hiding behind the excuse that it was to teach Sam to live without you. But really, I was just jealous. Castiel is so taken with you, and I don't understand why.

So again, we left. We heard of how you'd gone to Hell, and I thought that was that. You would be resurrected, say yes to Michael, and we'd never see you again.

But no. You have to be stubborn.

And so we do meet up again, and I stick you and Sam in TV Land, because I have to get you to say yes. Because if I don't, then you'll take my little brother away from me. And I can't have that, can I?

And then you figured us out. I have to say, I wasn't expecting it. I should have kept my temper in check. But what can I say? I'm an archangel. A temper is a job requirement. And now that you know who we are, Castiel is restraining himself less and less. He pops into your motel room when Sam isn't there, and chats with you. Sometimes he even watches you sleep, and steps into your dreams. I'm not sure I want to know what goes on in there.

And what's worse, is that you're as drawn to him as he is to you.

Well, Dean, there's something you need to know.

Castiel is my little brother, and he will never be yours. So go back to Sam, where you belong, and leave my Cassie alone.

I wrote this for an AU contest on deviantART for a club called Supernatural-Club. I have a feeling this isn't going to make it to the finals but hey, at least I entered. First contest I ever participated in.

I...don't really know how to explain this. It's pretty self-explanatory as it is. But if you have a question, feel free to present it, and I'll answer to the best of my ability.

I appreciate feedback - let me know what you think!