A/N: I've entertained the idea of writing something like this for a while. It took about half an hour. Something I like to call a fruitful waste of time.

Warnings: R just to be safe for innuendo and language. Sara x Kira.

b Some Things /b

There are some things you just don't do.

Some things, which the 'since we were in diapers' friendship won't stand. No matter how hard you tell yourself that he'll understand, in the back of your head, you i know /i that every person has a breaking point.

Perhaps Setsuna's sister is his breaking point. You have a painful feeling that she is. And if you get caught... You're fucked.

You've always been fascinated with the kind of relationship Sara and him have. The fierce, unadulterated i belonging /i that they feel towards each other, as siblings, goes beyond reason. She is the only thing that can ever make him lose his temper. Push him over the edge. Not her directly, but what ever happens to her. Any little thing that has any kind of negative influence on precious Sara is deadly. And somehow, you still have the suspicion that being his best friend won't do much to his anger.

It's bad to think of her the way you do. But Setsuna will never find out what you think. Actually i fucking /i her on the other hand is a completely different story. The further you get, the worse it becomes. It gets to the point that you can't physically be around them both at the same time. Just because the guilt chokes you, and you can't keep sneak glances at Sara because you think that it's as if you were screaming it out. You think he'll know. Or even worse, suspect. Because if he suspects, you won't know. One careless move and he'll explode.

You look at her now, on the couch, eyes avoiding yours. Her brother isn't home. She knows what you want to do. And she wants to make the first move but she's scared. i Terrified. /i You've heard her talk about it before. Months ago. When it started. She was a lot more reluctant then. Now she just doesn't think. Sara gives it up immediately, because it consumes her as much as it does you.

"We have at least fifteen minutes." you blurt out. Her gaze darts towards yours and within seconds she's too close and her lips are right there. It happens instantly. She's on top of you and her hands are everywhere. You touch her as if after a week-long starvation diet, even though it's only been two days since the last encounter. For ten solid minutes there is no sound except breathing. Six hundred seconds of constant friction.

A key turns in the front door lock. You hear it, and a fraction of a second later she scrambles for her shirt, you feverishly pull on your own and blow hair out of your eyes. She plops down onto the opposite end of the couch just in time. Setsuna strolls into the room, casually smiling. Looks at you. His smile falters. And you feel like you're going to die right then and there. His smile disappears completely. You're mentally saying prayers to yourself and thinking that if God helps you through this one you will never sin again. Or try not to.

"Shit. I forgot to buy the lighter." he murmurs. "I'll be right back."

The front door slams. And you and Sara are alone again. She looks at you. You look back. Then you look away, because you know that God might not be that kind the next time around. Sara licks her lips and exhales. Your eyes are on her again.

There are some things that you just don't do. Those things are coincidentally the ones that you want to do most.

b End. /b