Title: Not Your Daddy
By: assette
Pairing: Gil/Nick
Rating: NC-17
Summary: After watching the King Baby ep (well as soon as I stopped saying "wow" at any rate) I thought of this.

***

They had just walked out of Forever Baby and gotten into the SUV and Nick has to keep glancing over at Grissom because, it seems, the man simply can't stop smiling. "Don't go there man."

"Go where Nicky?"

"Don't play dumb with me, I know that, that look." Grissom glances from the road to Nick; giving him his best innocent smile, but saying nothing.

"Gris." Grissom just smiles wider; showing teeth now.

"I am not calling you daddy, no way." Grissom laughs out loud then and Nick tries to keep his expression serious, but nervous laughter bubbles over anyway. Grissom reaches over and sets his hand on Nick's thigh, and Nick inhales sharply.

"That's not exactly what I had in mind," punctuated by a squeeze. Nick forces himself to hold still and keep breathing, he just had to appear calm, assume nothing. Nick knew going into this relationship that he was by far the more vanilla of the pair, but he kept waiting to find Grissom's limit, everyone had limits right? Just because Grissom said he would try anything once, didn't really mean he would try ANYTHING, did it?

He willed himself not to squirm, Grissom was always doing this to him; it wasn't pushing exactly, just always testing. He had never tried to talk Nick into anything, he would just throw things out there, plant ideas in his head; and if, when, Nick went for it, the next time he would throw just a little further out. Last month it had been a vibrator, and god remembering that made him flush. They hadn't even talked about it, not really, Grissom had just left it on the dresser still in it's package. At first Nick had blanched, weren't vibrators just for girls? It was a week before he took it out of the package, three before curiosity overran his better judgment. He just fished it out of the drawer and handed it to Grissom, the man hadn't said anything at all, just gave him an enigmatic smile and turned it on with a flick of his wrist. And god, it had been good. He was like one of Pavlov's dogs now, when Grissom wanted to play all he had to do was turn it on and the sound alone would have him rock hard and squirming.

Grissom was still driving along, all nonchalant, like he didn't know exactly what he was doing. Grissom would tell him what this new idea was when he was damn good and ready and not a moment before. There was no way his erection had gone unnoticed, Grissom was just ignoring him. Huh, well two could play that game. He spread his legs a little farther apart and rolled his hips forward a fraction. He saw Grissom smirk out of the corner of his eye then the hand that had been burning a hole in his thigh slid higher, pressing just hard enough. Ha, score one for Stoke's. He rolled his hips again trying to press up into Grissom's hand and was rewarded with a firm stroke, god that was perfect. But then the warmth was gone and Nick had to whimper, things were just starting to get interesting.

Grissom's hand was now draped casually over the arm rest, his fingers were so close to touching the side of Nick's knee, just out of reach, tease. Calling Grissom daddy wouldn't be that weird, would it? Yes it would. But was he willing to do it just to have that amazing hand back on him? You betcha, god he was pitiful. He turned, something clever on the tip of his tongue, only to see Grissom climbing out of the SUV. Damn, How the hell were they home already?

He hurried to catch up, followed Grissom in the door. When he went to hang his jacket he felt Grissom palm his ass. Thank god, they weren't done. It made him a little crazy when Grissom got his engine all fired up then just left him idling until he felt like going for a drive. It was awfully hard to get his coat on the hanger when Grissom was nuzzling the back of his neck like that. He managed to get the closet closed then both of Grissom's hands were on his ass, squeezing him through his jeans. Oh, yes, he was definitely getting some tonight.

Question was, did he want it in the hallway, on the couch, in the bed, or somewhere in between. Hmmm, while his dick was voting for the hallway his knees demanded a bed. He stepped out of Grissom's embrace and started making his way towards the bedroom. It was a short trip. He sat on the edge of the bed and toed off his shoes then started scooting backwards. At least he wasn't the only pavlovian one; Grissom, quite predictably, was all over him before his ass made it to the middle of the bed. Grissom's tongue rediscovered the inside of his mouth while his hands made short work of unbuttoning his shirt. Nick had barely gotten Grissom's shirt untucked when Grissom sat back and stripped it off. Nick followed suite, smiling smugly. Seems he wasn't the only eager one. Nick sighed happily when Grissom settled his weight on him, then got back to the very important matter of counting the cusps on Grissom's molars.

When Grissom broke the kiss to mouth his neck, Nick started groping his back trying to get him closer. Grissom ground his hips against Nick's groin once then flipped them over. Oh this was much better, he could shamelessly hump Grissom's hip in this position and Grissom's hands were free to play with his nipples. This would be much more fun without pants. He leaned down for a kiss and worked his hand in between their bodies to get at Grissom's fly. He had just started on the zipper when Grissom's hand came out of nowhere and smacked him on the ass.

OH. Oh, god. So it wasn't daddy after all. He hid his face in the crook of Grissom's neck and stilled. When no words were forthcoming from Grissom, Nick went back to work at his fly. Only to have the same hand slap against his ass, harder this time, and Nick had to grunt, shift his hips forward to get away from it. He tried to wrap his mind around the idea of Grissom spanking him, without much success. He started toying with the tab on Grissom's zipper not sure what he was supposed to be doing next.

"You want another Nicky?" The hand in question was rubbing over the curve of his ass. He stopped to think about that for a second. Did he want another one? The left side of his ass wasn't tingling exactly, just hyper aware of the movement of Grissom's hand. He found himself wondering if it would start tingling if that hand connected with skin instead of denim. He circled his hips trying to get some friction to relieve the sudden ache in his groin. Skin on skin sounded really good. So yeah, apparently he did want another one. He tugged Grissom's zipper the rest of the way down and got his wish. The hand came down again, lower this time, where the curve of his ass met his thigh and he had to gasp; the sting sent a jolt straight to his dick.

"Get your pants off." Guh, oh yes, he loved it when Grissom's voice got gravelly and demanding. He rolled to the side and started wiggling to get out of his pants as fast as possible. Grissom shed his own pants, grabbed the lube from the bedside table, and tossed it on the bed. Nick was pretty sure a swarm of butterflies had taken up residence in his belly. Did butterflies swarm? He'd have to ask later, much later. Grissom cupped his jaw; gave him a dry kiss and a reassuring smile.

"Get on your hands and knees." He scrambled a little to comply and couldn't help looking over his shoulder. Grissom looked him in the eye and started rubbing his hips. When the hand came down again, he wasn't anywhere near as prepared as he thought. Without pants in the way, not only did it sting, it kind of hurt. He took a quick deep breath, but let it out again just as fast when the hand landed on the back of his thigh. His eyes teared up even as his balls tightened. Three open handed slaps to the center of his ass made him cry out, his hips jerked forward, trying to get away from the pain.

He couldn't decide if this had been a good idea or not; his ass felt like it was on fire, but that was nothing compared to the ache in his balls or the throbbing of his cock. He whimpered when Grissom started running his hand over the reddened area. Had to bite his lip to keep from screaming when a slick finger pressed into hole the same time a resounding slap hit the side of his ass. Oh, fuck. No way he was gonna last at this rate. He had to fall from his hands to his elbows and rock his hips back against Grissom's hand when a second finger joined the first.

"Beautiful like this." Another smack and those fingers kept scissoring, working him open. He wanted to tell Grissom to go ahead and fuck him already but the only sound coming out of his mouth was a high pitched keening.

When a third finger joined in and Nick couldn't take anymore. "Please." Grissom pulled out his fingers and rained down five slaps in succession. Nick just clutched at the sheets and buried his face between his hands trying to ride out the pain. Then Grissom was pulling at his hips; he groaned as Grissom pushed in deep, flush with his body in one smooth stroke. Oh, fuck yes, he loved the way Grissom's cock still felt like it was stretching him open no matter how much he fingered him first.

Grissom's hands tightened on his hips then he was thrusting, hard and fast. Nick had no hope of matching his rhythm; he could only take it and cry out every time Grissom's hips slammed up against his abraded ass. He was so close, just a little more. And maybe he had said that out loud, because now Grissom's hand was at the back of his neck holding him in place; the change in angle made Grissom's dick rub his prostate with every stroke. His vision was graying around the edges and he could feel the orgasm rippling down his spine.

"Let go Nicky." Oh jesus fuck, yes.

When he came back to reality Grissom was petting his sides and kissing his shoulders. He was pretty sure he was never going to be able to sit again. He tried to move but was still pinned by Grissom's weight. Grissom gave him a kiss on the back of his neck then rolled, taking Nick with him. He wiped ineffectively at Nick's groin to clean him up then pushed at the comforter. It took a lot more maneuvering than Nick would have liked to get them both under then covers.

"G'night... da..."

"Don't say it Nicky."

"I wasn't gonna" Grissom snorted and snuggled closer.

***