Author's note: This is a tag on to the episode that was on last Monday. (The one with all the dominatrix stuff) This is probably just a one shot deal, and it's definitely rated M so don't let your kids read it. If you're in my forum, please don't post this there since we don't have a filter for the adult stuff right now. Other than that, enjoy it and let me know if it's too… um… M… lol

Disclaimer: I'm not making money off Castle or this story.

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They were quiet on the way down to the street level, but as they were walking out into the evening air, Beckett couldn't help herself. She turned to Castle with an odd expression that he couldn't read.

"You were really into all of that, weren't you?"

He frowned.

"All of what?"

"The whole dominatrix thing. I saw the way you were sitting when we were interviewing-"

"It was different," he interrupted. "And daring. And oh, so sexy…"

She smirked.

"True."

"You're telling me you aren't interested in that?" he challenged.

"Why would I-"

"Oh, I don't know… because you're a control freak? You would be perfect for the role; you're already there, really. Just without the leather and with a gun."

She flushed.

"That's not true."

"No?"

"No."

"I don't believe you."

She scowled.

"I'm going to end this conversation before it ends with you bleeding."

He smiled, which he knew would annoy her.

"And masochistic, too… I like that."

She rolled her eyes.

"Good night, Castle."

"Night, Beckett."

They turned and went their own ways, but he turned and watched as she got into her car, and stood watching her until she started it and pulled up beside him, rolling down the window.

"Get in."

He chuckled, because it certainly sounded like an order to him. Not that he wasn't going to obey it, of course. He opened the passenger door and got in the car, not saying a word as she drove them over to her place.

They were both silent as they walked to the elevator and the ride was just as quiet. He started to say something when she led him out into the hallway on her floor, but she held her hand up to silence him, and he noticed that he couldn't tell what she was thinking just then. She unlocked her apartment and gestured for him to precede her inside, and then closed the door firmly behind her.

"What's going on?" he asked, curiously – and maybe a little hopefully.

"We're going to experiment," she told him. "Get undressed."

He couldn't hide the surprise he felt at that.

"Excuse me?"

She smiled, amused, and a little nervous – although she was trying very hard to hide it.

"Are you deaf, Castle? Get undressed."

"Are you going to push me out into the hallway when I do?" he asked.

"No."

"Promise?"

"Castle. Get naked."

He did what she told him to, wondering if she was really serious or if she had something else in mind and was just looking for a way to get back at him for all his smart-assed teasing. His shoes, socks, shirt and pants were easy enough, but he hesitated just a moment before dropping his boxers. She watched him without expression, although her eyes lowered to his midsection when he kicked his shorts away with a negligent motion.

To his surprise – or maybe not, really – he found himself getting turned on by the way she was watching him. Naked like he was, there wasn't any hiding it, either. She smiled, her eyes coming back up to meet his.

"Turn around."

He started to ask her why, but decided that it would ruin the game. Instead, he did what she told him, and was surprised when he felt her take his wrists, wrap them with what felt like a hand towel, and then snap on a pair of handcuffs.

"Okay," she told him, turning him back around so he could see her. "Here's the deal. I'm in charge, and you have to do what I say. Got it?"

He smiled.

"Got it. When we're done, do I get to be in charge next time?"

"We'll see."

She stepped close to him, reaching her hand out to slide her finger along his erection, which caused him to swell even further and to groan in pleasure.

"You like that?"

"Yeah." He was feeling just a little light-headed, but it could have been because his blood was rushing in the other direction just then. "Do it again."

She pulled her hand away.

"I'm in charge, remember?"

"Sorry."

"You're forgiven." She took off her jacket and tossed it onto the chair in the living room.

"Come with me, Castle."

"I certainly hope so."

She couldn't help but grin at the completely immature quip, but she hid it from him as she led him to her bedroom. She shut that door behind them as well, and turned to face him once more.

"Undress me."

He frowned.

"Take the cuffs off."

"No."

"Then how am I supposed to…" he trailed off, noting her slightly naughty smile and the challenge in her gorgeous eyes. "Never mind," he told her. "Leave them on. I'll figure out something."

"I figured you would."

He stepped up to her, lowering his head to the front of her shirt and pressing a soft kiss against her left breast, covered though it was. Then he put the top button of her blouse in his mouth and used his teeth and tongue to undo it. It took a moment, but it worked, and he moved down to the next one, not missing the sudden hitch in her breathing when he took that one in his mouth at the same time he exhaled, which bathed her breasts in a puff of moist, warm air.

"Don't stop," she told him, holding herself as still as she could.

He mumbled something, but she couldn't understand him. The next button came off, as did the next. He had a little more trouble once the blouse was mostly undone because it kept sliding around on him, and he was distracted by the soft white silk of her bra as more and more of it was exposed the lower he went. Finally he undid the last one, and caught the collar of the shirt and pulled it off from behind, leaving her in her slacks and bra.

There was no way he'd be able to undo the small clasps of the bra, he decided, but it shouldn't be too much trouble. Instead, he put his teeth to the material in the front, between her breasts, and pulled up and out. The scrap of clothing came up and she helped him out by bending slightly and raising her hands over her head to allow it to slide right off.

Flushed with success – among other reasons – he hesitated for a moment, admiring the view of her naked from the waist up. She allowed him to, meeting his gaze with only the slightest of blushes (and she, too, probably was flushed for more reasons than one). He leaned forward, kissing her between her breasts, and then taking the nipple on her right side into his mouth and teasing it. She gasped in pleasure, but then back up a step, pulling it away from him.

"Finish what you started," she told him.

"I thought I was…"

He wasn't going to argue, though. She kicked off her sandals for him, and it wasn't hard to get hold of the waist of her slacks and panties in his teeth and start pulling them down at the same time. He had to get on his knees in front of her to do it, but she didn't comment on that and he certainly wasn't going to complain. He could feel the heat of her long before he exposed her, and he could smell the delightful scent of woman that was keeping him as hard as he'd ever been.

She stepped out of her slacks and panties, and for that moment, while her thighs were parted, he pressed a quick kiss against the inside of her thigh. Beckett put a steadying hand on his shoulder, shuddering at the touch of his lips in such an intimate place, but didn't push him away. He looked up at her, not bothering to stand.

"Now what?" he asked, his eyes gleaming with anticipation and arousal.

She sat down on the edge of her bed.

"Finish what you started…"

OOOOOOOOOOO

I guess this could be a two shot deal, or I could leave it at that. What do you think?