Disclaimer: I don't own Life With Derek, or the characters, much to my dismay /

She thinks she may finally have forgotten how to breathe.

This is how it begins:

Derek's sitting on her bed, nothing out of the ordinary, and they're doing the usual insult/name-calling routine. But somewhere between the jabs of 'princess' and 'Neanderthal' he moves from his safe, distant position to one much, much nearer to her. Much, much nearer. So close, in fact, that she can practically taste the peppermint and chocolate on his breathe, and his Old-Spice cologne begins to suffocate her. And this too, is not out of the ordinary for them. What happens next, though, is. His scent is so over-powering that her internal Derek-Alarm shuts off, and the sensible part of her brain flees somewhere into South America. And, South America being as far from Canada as it is, the part of her brain that remains politely forgets the existence of the sensible section, and urges her to move several steps forward. Her muscles, being obedient and unaware of the awful Deed they are about help commit, comply, and lo and behold, Casey kisses Derek.

Of course, in the aftermath, Casey casually 'forgets' that she initiated the Deed and places the blame completely on Derek. Because he is an ungrateful, selfish, disgusting sexist pervert and would do anything to cause a Casey-freakout. So it's his fault! He did this on purpose! He clearly knew how her brain fogged up when he moved into the 5 ft by 5 ft Derek Free Zone and he charged beyond it into the 2 ft by 2 ft Derek Danger Zone just to make things that much worse!

But returning to the actual Deed.

So Casey kisses Derek. It starts as a (relatively) innocent (almost) sisterly peck on the (not quite) cheek, but Derek moves his head and suddenly they're full-on making out. Like, his tongue is down her throat and he's sucking on her bottom lip and then her neck and his hands are everywhere, and so are hers, and Oh God when he starts kissing her neck, all rational thought goes completely out the window, and Casey thinks, what the hell, how much worse can this get (Big Mistake: so, so, so much worse). So she starts tugging on his shirt, and so that comes off, and hers follows pretty quickly too, but that's not enough for either of them because the skin on skin friction is like heaven, but there's not enough, so there goes her bra, and his pants, and her shorts, and before she even realizes what's going on, his mouth is burning a trail from her collarbone to her left breast, across to the right and then down her stomach to her left hip and then her sensible-but-slightly-sexy light pink lacy underwear is being ripped off, and she almost loses her balance. His chuckle of "Klutzilla" registers several seconds too late, because right as she's about to retort, his mouth is on her and he's eating her out and she can't speak anymore. She clutches at his head, fingers tangled in his red-brown curls and she thinks this is why he's got all those blonde bimbos (plus Emily) lusting after him. She can't really blame those girls anymore.

And just as she's about to hit the metaphorical ceiling, his mouth is back on hers and he starts pushing her back towards her bed, but she decides he can't win this, she's going to show him what her mouth can do too. She sucks on his neck -yeah, his hickey is twice as bad as the one he gives her, but she's too proud of it, what ends up being the first of many markings of Her Territory, to think about her usual "Derek-you're-disgusting-why-do-you-let-all-your-whores-eat-your-neck-like-they're-animals" routine- and moves slowly down his chest and those incredible abs to where his boxers and skin meet. He begins to protest – "Casey, you don't have to prove anyth-" but a groan cuts this off, because she's pulled the boxers down and gripped him, hard, at the base, and her tongue is tracing a path from his balls to the tip of his shaft. She looks up at him, eye-contact, as her mouth goes up and down, and he's clearly losing control, if his moans and "Fuck, Casey" 's are any indication, and she deep-throats him until he's gasping and she knows he's close, but right before she can decide whether to let him come, he pulls her up and they're kissing again, desperately clutching at each other's bodies. He all but throws her on the bed and crawls on top of her, and every movement and every touch is like searing pain, but so delightful that for days after just thinking about the Deed makes her wet and breathless.

When he thrusts into her, all the way, the pleasure is so great that she can't help but arch up into him and cry out. But it's not a victory for him because he groans too, so Casey doesn't feel like she conceded anything and she closes her eyes and clutches at his back, nails tearing at his skin. He buries his face in her neck, but she moves to kiss him as he starts moving faster, figuring if his tongue is down her throat she can't say anything stupid in this hazy sex-crazed state she's in. Their kisses turn sloppy as they both get closer, and she starts shaking just as he bites out that he's about to come. She sees stars and can't stop the moan of "De-rek" that comes out of her mouth, and after they both come down from the high, he pulls out of her, and curls her into his chest and whispers, "That's the only way you should be breaking my name in half."

Just before she falls asleep, still spooned into Derek, her mind begins a slow return to sanity and she realizes- this Deed? It has the potential to turn everything upside down. And just as she's ready to pull away and have a Casey-Panic-Attack, Derek, who must have some sort of super-sense, smoothes his hand across her stomach and mumbles into her shoulder "Stop thinking so hard, I can hear you overanalyzing this. Sleep and you can freak out on me in the morning."

Well. Casey thinks then that maybe she hadn't given him enough credit in the Brainiac Department. She'd have to investigate that in the morning. So she snuggles into Derek and falls asleep, postponing her panic for the first time ever, but as of that moment, definitely, definitely not the last.

/

Anddddd that's the very first chapter of my very first fanfiction ever ReviewReviewReview please- how can I learn if I don't get any input?