Disclaimer: I'll tell ya what I want, what I really really want. It's Castle.

A/N: This chapter is where it starts to turn M so if that's not your style then just scurry on off, or skip it, either works.

"Tell me you saw that!?" Castle screams excitingly, holding the killer's gun by the barrel after elbowing him in the face, knocking him down to the sidewalk while Beckett ran up beside him, pinning him down quickly. "Ow, ah." He uttered, tripping slightly over the unconscious body and stepping on some miscellaneous junk scattered along the ground of the alley.

"You're gonna put that in your report right?" He continues, excited that he got to act like one of the heros he wrote about in his books.

"Can I see the cuffs please?" Beckett says exasperated as she straddles the murderer, who turned out to be Allison Tisdale's brother, and pins his hands behind his back, flipping her short hair out of her eyes to stare at the cuffs in Castle's hand.

"Yeah, yeah." He kneels beside her and hands the cuffs over. Once the killer was safely secured she sits back up on her knees and pushes him back against the brick wall harshly, obviously upset with him.

"What the hell were you thinking you could of gotten yourself killed." She scowls at him as she readjusts her position against Harrison Tisdale's back, making sure he didn't attempt to escape.

He leans forward and gestures to the gun. "The safety was on the whole time." He falls back against the wall once again to catch his breath.

She glances at the forgotten gun on the ground and looks back at him with a slight grin. "Ya know, you could've told me."

"Where's the fun in that?" He smiles back at her as he taps the back of the killer three times, letting out a grunt when he pulls himself up.

Once the extra backup arrives, Beckett hands Harrison off to Esposito and goes to stand over by one of the blue-and-whites, watching the whole ordeal a few feet away from her before she hears a familiar voice clearing his throat. She turns around to be met with who she expected. Richard Castle.

"Well, guess this is it." She shoots him a small grin, mostly masked by the professional look she tries to cover most of her interactions with.

"Doesn't have to be. We could uh.. go to dinner, debrief each other." He replied, trying to find any reason to stay with this woman he has been positively intrigued of ever since she flashed her badge at him a few days ago.

Her grin widens as her mask falls a bit. "Why Castle so I can be another one of your conquests?"

"Or I could be one of yours." He smiles boyishly at her.

She purses her lips together, actually considering the offer he was giving her before settling on an option.

"It was nice to meet you, Castle." She holds out her hand.

He glances down before taking it in his larger one and smiling at her again, this time with a bit of disappointment behind his baby blue eyes.

"It's too bad, would of been great." The smile he gives her reaches his eyes and she can't help but think of how right he is. It would be fantastic between them.

She bites her lip before taking a step forward and positioning her lips right next to his ear, whispering. "You have no idea." She reaches into the breast pocket of her light blue button up and pulls out a piece of paper and the pen from his front pocket, scrawling a quick message as he watches.

"Meet me at this address, one hour." She whispers, their faces still inches from each other's as she pushes the message into his hand and pulls away from his ear. As she turns away she makes sure to add an extra swing to her hips, making them even more irresistible than they were before.

His eyes grow wide as they flick over the address she scrawled on the back of a business card. He never thought a woman Detective Kate Beckett would even agree to spend any unnecessary time with him, let alone suggest it, especially with his surface self. The one who signed chests and had strings of one night stands.

He tucked the precious card into his breast pocket and turned away when she finally turned the corner of the large building. She was all he could think about on the cab ride back to his place. Once he was inside he ran to the bathroom excitingly, stripping down and hopping into the tub to take a quick five minutes shower.

Castle then stood in front of his walk in closet, trying to decide which button down would be the best to wear tonight. He finally chose the dark blue one that brought of his eyes, or so his mother and daughter thought before slipping on his black jacket.

He quickly stepped into his black dress shoes and nervously ran his hand through his hair for about the tenth time since he got home forty-five minutes ago. Castle glanced at his watch before finally deciding that Beckett should be ready by now. He grabbed his keys on the way out and shut the door behind him forcefully, bounding down the stairs because he didn't trust himself to keep still in the quiet of the elevator.

Kate stood in the middle of her living room, contemplating if she should continue pacing around her couch or just sit down somewhere and try to convince herself that this wasn't a big deal. Richard Castle, her favorite author was going to be in her apartment in less than ten minutes. Maybe she could live with that fact that he was just going to come over but that's not what this was at all, not from the way she leaned into his ear and sexily whispered to meet her at her home.

She ran both her hands through her hair and took a deep calming breath which was rudely interrupted by the sound of a knock at the door. He's early, she thought. She shouldn't be nervous, she doesn't want him to see her nervous, not when she was the one that was so confident back at the alley and invited him here in the first place.

When she finally managed to somewhat pull herself together, she took large steps forward before checking her peephole, which was now a habit of hers, and reaching up to unlock the door. Castle stood there, looking sexy and ruggedly handsome. All the planning she had completely flew threw her mind when she opened that door, even the bottle of wine she picked up on her way home was forgotten in the refrigerator.

Kate grabbed him by his blazer lapels and pulled him into her apartment, slamming the door before pushing him up against it and pressing her lips firmly to his. Castle was surprised to say the least, of course he knew why she had invited him here but he didn't think that she would rush into it so quickly. He quickly recovered, grabbing her waist and tugging her closer to him and slightly up as well. Kate whimpered as he pulled away from the door, spinning her around and pushing her up against it as well. She quickly pulled herself up and wrapped her long, taut legs around his waist.

"Bedroom." He gasped when they both finally pulled apart from one each other when air became a necessity.

"Down the hall." She breathed, re-connecting their lips and lifting a finger to point him down the hall towards the room she slept in.

"Shit Kate." Castle groaned as she traced his upper lip with her tongue before sinking her teeth into the flesh of his bottom lip. She pulled back and grinned at him before running her small milky hands up his chest, popping the buttons of his shirt open one by one.

"This color really brings out your eyes." She murmurs as she popped open the last button. She slowly moved into a squat and moved her tongue over his navel before straightening up and sliding the shirt down his muscular arms.

"Everybody tells me that." He says on a breath, trying to control himself as she slowly undressed him. Her hands were making their way down his now bare chest and to his dark slacks when he stopped her.

"Are you sure about this?"

"Of course I am." She whispered, leaning forward to press her lips to his chest, he reaches his large hands in between them and starts to slowly unbutton her blouse, similar to the one she wore in the cafe that started this whole chain of events.

"I'm done being slow." She looks up into his dark eyes with a lustful look. Castle hums slightly before nodding and sliding her shirt down her shoulders, throwing it into the dark corners of her bedroom. He pushed her down onto the bed before she forcefully pulled him ontop of her. They kissed each other deeply as they simultaneously rid each other of the rest of their clothing.

"Now Castle.. please."

He kissed his way up her neck and was about to make the leap when he suddenly remembered.

"Wait, condom." Castle whispered into her ear.

"I've got it covered." She spoke between short pants.

He nodded quickly before covering her mouth with his and slowly sinking into her hot, wet heat.

"Oh fuck." Kate gasped out as she widened her legs, wanting him to reach deeper inside of her. She wrapped her legs around his waist to pull him closer and to wait for him to

adjust. When Kate began to move her hips against his he took that as a sign to start moving.

She was so tight and wet that Castle knew this wouldn't be able to last as long as he wanted it to. She moaned loudly as his thrusts increased in speed and strength.

"More...Please, I need more." He pulled out almost completely and then slammed it all into her, all the way to the hilt.

"Oh God yes! Just like that... oh fuck." Her moans and cries kept him going, wanting to give her as much pleasure as he could before he couldn't handle it any longer.

The rough pads of his fingers tickled her skin as his left hand glided down her body until they found her clit. He circled her slowly which made her immediately tighten around him.

"God, I'm so...please...don't stop." He almost laughed at the statement, not even the apocalypse could stop him right now.

She finally broke as he rubbed her faster, crying out. "Shit! Oh Rick, oh yes. I'm coming!" He pulled her closer to him, latching his teeth into the soft skin of her neck as he thrust in one last time and exploded inside her.

He rolled off of her when he finally finished, they both sat there in silence for ten minutes, just trying to gather enough oxygen and energy to breathe properly. Kate finally turned her head towards Castle, she smiled at him and he smiled back.

"Hey." He whispered, rolling over and placing soft kisses to her collarbone.

The last thing she remembered is whispering some sort of greeting back before she drifted off to sleep, with her favorite author wrapped around her.

A/N: Only one more chapter left and it's already finished and edited so I might just end up posting it later today, who knows? Not even me...