A/N: This is my first story, so please be gentle with me. I've read a couple of dark Dasey stories, and I really liked them, so I figured I'd give it a shot. Reviews are appreciated, as are constructive criticisms. Flames, however, will be used to start a campfire for me to roast weenies over.

Disclaimer: I don't own Life With Derek, nor is any copyright infringment intended.

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Casey's POV:

Of course I only dated Sam to make Derek crazy. Why else would I want to be with him? Sure, he was sweet and nice and all that crap, but he was also boring as hell. The fact that it bugged Derek was the only reason to continue to do it. And I know that he only flirted with Emily to piss me off, so I would say that we are even. Of course, he doesn't see it that way, as I fucked Sam and he only ever made out with Emily. I told him, it's not my fault she's a prude, but of course, he wouldn't see it that way.

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Derek's POV:

Okay, so maybe I really did think that we should be even, but it was so much more fun to fuck with Casey. The fighting was so much more fun than just agreeing with whatever she said. So I'd fuck random girls, she'd get pissed, we'd scream, she'd find Sam and fool around with him, and then we'd end up in my room. Again. Every goddamn time.

"Fuck you, Derek! What was the slut's name, hmm? Did you even bother to find out?" Casey screamed at him.

"Why should I find out? Does it really matter? We both know I just do it to fuck with you." Derek replied nonchalantly.

"Thank you, Derek, for reminding me that you're such an asshole. I hate you."

"I know. Don't forget this goes both ways."

"Fuck off. I'm not coming back this time."

"Yeah, you will. Right after you get back from Sam's house. You'll come back because you need a good fuck after you get all hot and bothered, and let's face it, Sam just doesn't do it for you, and he never did."

"Maybe that's just what I tell you, so that you'll feel better about yourself."

"If that were true, you wouldn't bother coming back. You'd stay with the nice guy. You only come back to me because I'm a good fuck."

"I swear, I'm not coming back." She walked out and wished it was earlier so that she could slam the door.

"Yeah, you are. You always do." He laid down on his bed and waited for her.