A/N: Actual story progression in this chapter. Also smut.


The party was already in full swing as Alexis approached The Old Haunt. Her father had decided to host his Christmas celebration at his bar now that she, the youngest of his loved ones, had reached the legal drinking age. Alexis was overdressed for the old-fashioned speakeasy, having come straight from a gift exchange with her pre-law study group, which admittedly wasn't that formal, but Kevin was going to be here tonight, and she had a plan. She donned a sparkly silver party dress, toeing the line between adorable and salacious with its long sleeves and short, flowy hemline, large bow just under the scoop neckline covering her bust and giving the illusion of her being tied in ribbon and ready to be unwrapped.

Alexis swung open the heavy door of the tavern and started making her way through the crowd of her dad's coworkers from the precinct and faces from the publishing world that were making an appearance. She was searching for her father or stepmom, wanting to let them know she'd arrived. Passing by Eddie, who was manning the piano as usual and treating the guests to a selection of seasonal tunes, she asked him to point her in the direction of Castle. He sent her towards the bar, where she found her dad holding court, telling a wild story to a small group that had gathered around him.

"Merry almost Christmas!" Alexis interrupted, wrapping her arms around her dad, and snuggling into him.

He abandoned his tale without a second thought, hugging her back gleefully. "Merry almost Christmas to you, my little angel. I'm glad you're finally here, I need your help," he said in hello. "Mother has been canoodling with her gentleman friend all night and I need you to break it up. She's already mad at me for interfering."

Alexis looked over to where her grandmother was dancing very closely with a silver fox as 'Baby, It's Cold Outside' played over the speakers, "I am so not getting involved. Grams can do whatever she wants, and I think it's sweet she has someone for the holidays. Speaking of, where is your better half?"

"Traitor!" he playfully exclaimed, then pointed to a booth where his wife was seated, "And Beckett is over there with Lanie. I was banished so they could talk about something, presumably how wonderful I am."

At that moment Castle's book agent Paula swept up to pull him into a conversation with some important connection or another. Alexis turned around to face the bar, and flagged down the bartender, ordering a Shirley Temple. She needed a clear head if she was going to successfully execute her plan to flirt with Kevin and casually give him her phone number before the night was over. Her eyes scanned the party looking for his angular face. She located him at one of the pool tables, playing a game with Detective Esposito.

She put an innocent smile on her face and sauntered over to the pair. "Who's winning?" she asked, startling Kevin who hadn't yet noticed her presence and causing him to miss the shot he'd been lining up.

"Well Ryan was, but here's my chance to catch up," Detective Esposito answered laughing, and stepped up to the pool table to take his turn.

"I'll play winner, if that's alright with you guys," she offered, gracefully climbing onto one of the tall stools next to the table where the detectives' beers resided.

She plucked the cherry out of her drink while she watched Detective Esposito raise an eyebrow at Kevin and the smaller man nod subtly at him in return. "Yeah, Alexis. Of course…" Kevin trailed off as he turned to face her just in time to watch her bring the cherry to her lips.

Alexis held his gaze as she used her full lips to pull the cherry off its stem before drawing the red fruit into her mouth with her tongue. "Thanks," she replied, smiling as if she hadn't just put on a show by seductively eating her drink's garnish.

Detective Esposito sunk two striped balls into the table's pockets before missing his third shot. Kevin turned his attention away from Alexis when his partner called out, "Bro, you're up."

She admired the way Kevin looked stretching out over the table as he lined up his shots. The sleeves of his white button down were rolled up under his elbows, giving her a peek of his forearms, and the navy vest of his suit pulled taut over his back, hinting at the defined muscles underneath. He wielded the cue with such control, sending balls careening at the perfect angle across the green felt to find their home in a pocket. He called his pocket confidently, before sinking the eight ball with finality, winning the game.

Kevin smirked at his partner, but Alexis noticed his eyes dart over to take in her reaction to his victory for just a second. Detective Esposito passed her his stick and deadpanned, "Avenge me, Little Castle," before departing from the pool table and walking over to slide in next to Lanie in the booth she shared with Kate.

It seemed as though the status of the Hispanic detective's on again off again relationship with the beautiful medical examiner could be shifting once again. As a result, Alexis was left alone with Kevin, or at least as alone as they could be in a crowded bar. She stayed seated as Kevin reset the game, waiting for him to speak first. She didn't want to push her luck and scare him off.

"Do you want to break?" he asked before the tension could mount further.

"No, you go ahead," she said with a smile, hoping to put him at ease.

"You do know how to play, right?" Kevin questioned her.

"Of course, I do!" she exclaimed, placing her hand over her heart in mock offense. "My dad taught me all the basics years ago. Although after the clinic you just put on, I have a feeling I'm in trouble."

He shrugged off the compliment, but seemed to enjoy the praise from her, then took position at the end of the table to make the first shot of the game. Kevin quickly took the lead, clearing three solids just in his initial turn. Alexis hopped down from her stool, and made her way around the table, slowly passing through Kevin's personal space. She delighted in the way his breath hitched as she did so, but he quickly stepped back putting distance between them.

She leaned over the table to line up her shot, knowing her hemline would rise and with where Kevin was standing, give him a glimpse of her pert backside, peeking out from her cheeky lace boy shorts. The low groan Alexis heard from behind her reassured her that she wasn't ridiculous for thinking he'd be interested in her knowing who she is. She pushed the cue forward in a jerky stroke, completely missing her intended target.

"Are you sure you know what you're doing?" Kevin asked, chuckling.

"Okay, so maybe the last time I played I needed a stepstool just to reach the table, but I'm sure it's like riding a bike," Alexis admitted.

"Do you want me to show you?" he offered, sounding hesitant.

"Yes, please."

She hoped that he would put his arms around her to demonstrate the proper motion, but instead he moved to stand next to her and began correcting the positioning of her hands. It wasn't exactly what she'd been looking for, but she still felt electricity where his hands touched hers.

"Not so hard now. You want your strokes to be long and smooth," Kevin said, unaware of the innuendo in his words until she turned her head to him with a smile and lifted one eyebrow. "You know what I mean."

She noticed his cheeks flush, glad to not be the one blushing for once. "Yes, Kevin," she emphasized the name he'd asked her to call him during the night they'd slept together, "I remember exactly how you like your strokes."

Kevin's eyes darted around, checking to see if anyone had overheard her comment. He cleared his throat and looked down at the floor. Alexis took her shot, following his advice this time, and successfully pocketed one of her striped balls. She turned to celebrate but paused, caught in his gaze as he looked at her intensely. He took the cue from her hand and placed it on the table along with his own, abandoning their game.

"You're playing with fire," he breathed out the words huskily, just loud enough for her to hear.

"Why Kevin, I have no idea what you mean," she spoke, but her mischievous smile said the opposite.

She wasn't expecting it when his hand latched onto her wrist and quickly pulled her down a short empty hallway and into the bathroom. This was definitely not part of Alexis's plan, not that she was complaining. Kevin quickly shut and locked the door behind them, and then he was pulling her into his chest, his lips capturing her own passionately. Her fingers threaded through his short hair, holding him to her and she kissed him back with the same urgency. They pulled apart slightly, hands still on each other, to look into each other's eyes. Kissing him was just as intoxicating as she remembered it. The all-consuming lust she felt was mirrored in his eyes.

Alexis surged up to reconnect their lips. Strong hands slid down the back of her bare thighs before hooking behind her knees, hoisting her up to sit on the edge of the sink. Kevin stood between her thighs and pressed his crotch against her own forcefully, never breaking their kiss. She gasped at the intimate contact, the friction making her need for him grow.

"We shouldn't be doing this," he muttered against the skin of her neck where he was now laving kisses.

"I disagree," she responded, her hands beginning to undo his belt buckle as she said so. "We just have to be quick, so no one notices we're missing."

Kevin groaned as her hand slipped into his boxer briefs and wrapped around his rigid length. Alexis loved seeing that she had this effect on him, the power to make him lose all thought. She moved her hand up and down his shaft quickly, her thumb swiping over the tip on each stroke. His mouth found hers again as she continued to pump his thick cock. Her tongue slid against his in time with her hand's movements. Kevin pulled away panting, and grabbed her hand, halting it.

"I need to be in you again," he pleaded sounding desperate.

"God, yes," she affirmed, and his hands immediately went to her hips before one slid under her dress to press against the wet lace covering her slit.

He pulled the crotch of her panties aside and rubbed his thumb up and down against her folds spreading her arousal from her entrance to her clit, before rubbing circles on the sensitive nub.

"Fuck, you're so wet," he breathed out. "You were driving me crazy out there. That little stunt with the cherry. Did you like teasing me like that? Did it turn you on?"

"Yes!" two of his fingers slid into her as a reward for her answer. "It's so hot knowing you want it as badly as I do."

There was no resistance as his fingers plunged into her again and again, more than slick enough to accommodate the stretch. His fingers scissored inside her, preparing her to take him. Alexis let out a loud moan at the stimulation, then immediately clamped a hand over her own mouth. She had to stay quiet unless she wanted to get caught, and considering it was her family and his coworkers on the other side of the door she most certainly didn't. His fingers curled against her front wall, and she whimpered before begging, "Kevin, please."

He pulled his fingers out of her, before tugging her down off the sink and spinning her around to face it. Alexis gripped the corners of the basin to help recover her balance after the sudden change in position. Her eyes met Kevin's in the mirror above the sink and she nodded, signaling him to continue. He rucked up the bottom of her dress up to her waist then dragged down her panties until they caught at her knees in her widened stance.

Kevin fumbled with his pants for a moment, before retrieving a condom from his wallet. She was lucky he had stashed one there, as the need for protection had completely escaped her mind during their spontaneous tryst. He rolled it on quickly then lined himself up behind her. Alexis's mouth fell open as he thrust into her roughly. His cock stretched her beyond what his fingers had, and the fullness was heavenly.

He began rutting into her vigorously, setting a punishing pace. Her knuckles were white, with how tightly she was gripping the sink for leverage, and she pushed back against him, meeting his thrusts. Alexis couldn't believe how quickly she was already approaching her climax. She'd never been fucked so roughly, and it was sending her into a beautiful oblivion. With one hand Kevin reached around her to start rubbing tight circles against her clit. Her walls started fluttering around him as he continued his ceaseless pounding.

"How are you so fucking perfect?" he asked, and she hoped it was rhetorical because at that moment she found his wild eyes in their reflection once more and came harder than she ever had.

Her pussy squeezed his cock tightly, milking him as he followed her over the edge and into his own release. She shuddered through the aftershocks of her orgasm, pleasure only just beginning to recede. The sounds of their heavy breathing filled the small bathroom, several moments passing as they made eye contact in the mirror before he pulled out of her, and they began to right themselves. Alexis pulled her panties back up and then combed through her ruffled hair with her fingers, smoothing it out. Meanwhile, Kevin disposed of the condom then tucked himself back into his pants and doing up his belt. A sense of awkwardness settled over them but she was determined to power through it.

In all the time Alexis had spent planning for this evening, bathroom sex was never one of the contingencies she had considered. However, it seemed as good a time as any. She pulled a folded slip of paper from where it was tucked into her bra strap. She pressed the paper, which she'd written her phone number on earlier in the day, into Kevin's hand. She smiled, letting her hand linger in his and said, "Call me if you want to do this again sometime."

Alexis took one last look at his shell-shocked face then left the bathroom to rejoin the party.


A/N: Listened to Santa Baby on a loop in June to get into the right headspace for this chapter.