A/N: Prompt found on the castlefanficprompts tumblr: Judge!Beckett and Lawyer!Castle (or other way around if author prefers) who hate each other but still end up screwing in the chambers.

She already knew who was knocking on the door to her chambers and sighed heavily at the thought of having to speak to him again. "Come in," she called. Richard Castle strode into the room like he owned the place which really ticked her off.

"Ah, Mr. Castle. It's about time you showed up."

"My sincerest apologies, Your Honor," he said mockingly. "But my client needed to speak to me."

She scowled at him. "Watch your tone, Mr. Castle." Standing up from behind her desk, she walked around the front. "First, you backtalk me in my own courtroom and now, you show even more disrespect by mocking me in my chambers."

"And what're you gonna do about, Judge?" He practically spat her title back at her.

"It seems to me that you need to be reminded about who's in charge." Grabbing him by his tie, she yanked him down until their mouths connected brutally. She sank her teeth into his bottom lip, a thrill racing through her when he groaned. Pulling his tie off, she divested him of his jacket and neat button-down before turning him around with surprising strength and binding his wrists behind his back with the expensive silk tie. After shoving him into a chair, she threw off her robe, delighting in the lust that immediately filled Castle's eyes.

"So it's true, then," he teased. "Judge's really don't wear anything underneath their robes."

"Only when their expecting to fuck the brains out of jackass lawyers in their chambers later."

He raised an eyebrow and smirked. "Oh, so you were expecting this, Beckett?"

"Why else would I've told you to come here? It certainly wasn't because I enjoy your presence." Straddling him in the chair, she let her core come in contact with the bulge hidden within the confines of his pants and started grinding against him slowly.

"You're gonna ruin these pants," he panted. "And I just had them dry-cleaned."

"Too fucking bad." The friction the coarse material was giving her was absolutely delicious. Her clit throbbed and she ached for more. Fisting the hair at the nape of his neck, she pushed his head down towards her breasts and ordered, "Suck."

Castle wasted no time in taking her nipple into his mouth, lathing over it with his tongue and nipping at the taut peak. She bit her lip to stifle any noise that may come out of her throat. She didn't want to give him the satisfaction of making her lose vocal control. Thrusting her hips down once more, she climbed off his lap and unbuckled his belt. Tugging open the zipper, she pulled his pants down his legs and left them gathered at his ankles.

Beckett dropped to her knees and grabbed his straining erection in her hand. Pumping him slowly, she leaned forward and wrapped her lips around the head, her tongue darting out to lick the salty drops already leaking.

"Fuck, Beckett," he said, throwing his head back. He just wished she would release his wrists from their restraints. He wanted to take a fistful of her hair and shove her down on his cock until he was buried deep. He wanted to fuck that pretty little mouth of hers and have her gagging around him when he shot his load down her throat.

Hollowing her cheeks, she sucked on him until she dragged a long groan from him. The hand wrapped around his length moved down to massage his balls causing his hips to buck up from the chair.

He made a noise of protest when she eventually released his cock. Standing, once again straddled his lap and took him in her hand, running the tip through her wetness.

"You're so wet, Your Honor. Could it be that you actually like me?"

"Fuck you."

"That's the idea, Judge," he smirked.

Narrowing her eyes at him, she guided him to her entrance and sank down on his cock. "I fucking hate you," she told him.

"The feeling's mutual." He thrust his hips up, catching her so much by surprise that she almost let a moan escape her lips.

Winding her arms around Castle's neck, Beckett began riding him, taking him deep inside her as he moved forward to lick a hot stripe from the base of her neck to her jawbone. Fastening his lips to her skin, he licked, bit, and sucked until she forced his head back.

"Not giving you the chance to give me a hickey," she said.

"Would I do that?"

"You've done it befo—" Her breath hitched and her eyes nearly fluttered shut.

There is was. He smiled triumphantly as his cock hit that spot that always drove her wild. Shifting in the chair, he angled his pelvis so that she would have no choice but to continue rubbing that spot every time she slid down on him. With hardly any leverage to help him, he drove his hips up and finally, finally she moaned. Once that happened, her self-restraint was completely shot.

All the noises, the breathy groans, and grunts of exertion that she'd held back were now coming to light. She didn't silence herself anymore and let the pleasurable feel of his length disappearing inside her again and again wash over her.

She hated him so much. He was too cocky and arrogant and he hardly ever played by the rules. Especially when he was in her courtroom. It irritated her. And what's worse is that he knew it irritated her. And that's exactly why he did it.

But right now, he was doing everything right to bring her to her climax. She was so very close and it wouldn't take much to push her over the edge. Knowing this, Castle bent his neck and swooped down to tongue her nipple. It didn't seem like much, but it was enough to have her clenching around him, throwing her head back, and screaming his name. The second he felt her coming, he followed right after, coating her walls with his seed.

"I don't think you've reminded me who's in charge yet, Beckett," Castle told her after they had both come down from their highs. "After all, it was you who was screaming my name."

"You are such a jackass." Removing herself from his lap, she untied his hands and they began redressing.

As he buttoned the last button and tucked his shirt back into the waistband of his pants, he said, "And you need to loosen up. Although, you were pretty loose a few min—"

"Don't even think about finishing that sentence!" she ordered sternly. "Now, get out of my chambers."

Grabbing his jacket off the floor, Castle walked over to her door. "See you in court tomorrow, Judge Beckett." Her raised middle finger was the only goodbye he received. But as he left, neither realized that the same tiny smile was mirrored on one another's face.

A/N: I really hope you enjoyed reading this just as much as I did writing it. Feel free to leave a review and let me know what you thought.