"Beckett! This is a crime scene."

"Mm-hmm." Beckett hummed while continuing to undo his pant's zipper.

"A crime scene in a surgery room!" Castle tried again.

Beckett ignored him in favor of tugging down the waistband of his jeans.

In all honesty, he wasn't doing a whole lot to stop her – because, well, deep down he didn't want to stop her. He wanted to let her have her wicked way with him. But the responsible part of him wouldn't shut up about how this was a crime scene, there was blood splattered all over the room next door, and the surgery walls were thin…

"For once, Castle, can you shut up and stop thinking?" Beckett said, her loving tone taking all of the bite out of her remark.

"But…"

"Shh."

Beckett freed his manhood from his boxers. Despite the protests his brain had been putting up, his, well, other brain seemed to really agree with Beckett's current plan of action. She studied him for a moment, and then took just the tip of him into her mouth, flicking her tongue against the head before pressing her tongue flat against it. Castle groaned, leaning his head back against the wall. Beckett smiled around the object in her mouth, then opened her mouth wide and drew him in almost all the way. She slowly withdrew him from her mouth, dragging her tongue along the bottom of him the entire way. She repeated the action a few times, slow and deliberate. Castle breathed in and out slowly, doing his damndest not to make a noise. The dirty minx knew that he got vocal when she did this, and she was using it to tease him.

He was pretty sure this was payback for that trick he'd played on her in the waiting room a couple of weeks back.

Beckett scraped her teeth gently along his shaft as she moved her mouth down, and Castle's head fell back so quickly that he struck the wall. "Shit." He muttered.

"Hmm?" There really needed to be a law against Beckett humming while she had his cock in her mouth. Castle made a fist and resisted the urge to bang it into the wall at his back.

"Kate – seriously… you have to…"

Beckett responded by calmly bringing up one hand to grip him at the base, while the other used his hip as leverage to push him back against the wall. Castle's hands flew into her hair of their own accord. He tried to gently tug her head back, away from him, but she gave a slight shake of her head and went on as if he weren't doing anything.

At that point, Castle was too far gone to be able to walk, and since Beckett seemed determined to do this, he decided… well, he was a red-blooded man, after all, and… well…

He gave in, okay?

Castle sank against the wall and closed his eyes. Beckett made a sound of approval that rippled through him. She resumed her activities with renewed vigor, alternately sucking and licking (and occasionally squeezing) him. Castle knew very well how skilled she was at this, but that didn't ever alter how blown away he was every time. The sensations engulfed him, racing through his blood and filling his mind with such a blazing white haze that Ryan or Esposito or even his Mother (he didn't want to think about Gates) could have been standing there and he wouldn't have noticed.

Beckett's eyes flicked up to him momentarily, taking in his condition. She seemed to realize that he was swiftly approaching the point of no return, because she promptly deep-throated him. Castle gritted his teeth, a low grunt the only sound escaping his lips. Beckett was relentless, and the thought flashed across his mind, not for the first time, that she really could have made a career out of this and been richer than he was…

Hollowing out her cheeks, Beckett drew him out in a long, final suck, and he lost it. Fireworks exploded inside of him, tiny explosions of pleasure that ratcheted through his system, inflaming his blood and burning his skin and generally making him a worthless pile of goo.

It took a good minute, but the sparks of pleasure finally subsided and his vision cleared. He opened his eyes to find Beckett standing in front of him, her hands braced on either side of his head, a gleaming smile on her face.

Castle lunged forward and kissed her, his hands coming to wrap around her waist. Beckett responded happily, allowing him to taste both her and his juices on her tongue. As he kissed her, Beckett's hands busied themselves with pulling up and buttoning his pants, so that by the time they broke apart, he was once again presentable.

"Yo, where'd Castle and Beckett go?" Esposito's voice carried over from the next room.

Beckett gently tapped Castle's nose with her finger. Their slow, wide grins blossomed on their faces in sync.

"In here!" Beckett called, stepping away from Castle and heading back towards the gory surgery room. "We thought there might be something in the other surgery here."

"Maybe the killer hid in here while waiting to strike?" Castle asked.

As the investigation continued, Castle was confident that no one knew what had happened. Well, except perhaps Lanie, who kept giving Beckett the Eye of Impending Interrogation (patented by one Dr. Lanie Parish, M.E.).

But oh, it had been worth it. It had been so worth it.

Who's the one with 'improper crime scene behavior' now, Beckett? Let me tell you, this entire thing wrote itself. This was all her idea; promise.

For those of you concerned about the Beckett (and Castle) in my head, never fear! I have not begun hallucinating… yet.