You're in denial. But you don't want to admit that. There's no way any of this could be true. He's your brother, for fuck's sake and you never thought in a million years, he would actually override his personal boundaries like this.

You want to look away. Run screaming from the room, scratching your eyes out. But something is keeping you glued to your spot, making you watch with wide, horrified eyes. You know all of this is so, so wrong on so many levels. But…you just can't…leave. Satisfied growls slipping from your brother's throat as he ravishes the other man's mouth; dark overworked hands grabbing, pulling at trench coats and fleece shirts. It's almost animalistic. Beautiful, in a way. The angel pushes himself to his knees, pretty much curling himself tighter against your brother.

Your stomach flips anxiously as he runs a hand down your older brother's back. You can't believe this. You don't like this, but not for any reason any other person would feel sick watching two guys go at it. You don't like how Cas is petting your brother's face as Dean unbuttons the angel's trousers. You don't like the satisfied meows that the angel is pulling from your brother's mouth. You can't stand the fact that Castiel is straddling your brother, grinding his slim hips against Dean's crotch.

Your hands curl into tight fists and your breathing gets shallow. You wish you could send that pompous, puny angel back to Heaven, or Hell if need be. Their actions grow needier, rushed. Their clothes being peeled off piece by piece; coats crumpled on the floor, a tie on the lampshade, a boot under the bed. You know in mere seconds the room is going to reek of kinky sex and sweat, and you know you should let them know you're there, watching. But you're hoping you can stay, unnoticed.

Your heart pounds in your chest as Castiel lowers himself on your brother, letting out a low hiss through clenched teeth.

There's no denying it. The rumble in your gut, the intense desire to tear the angel to ribbons, the tinge of sadness you feel as their lips smash together passionately. You're jealous. Extremely jealous. And you're hoping that standing and watching in sick fascination will soon upgrade to a spot on that stained motel bed.

So you watch, your mouth watering as they make love like no one's watching.

Little do they know…