"For our final day together this weekend, we will be going zip-lining over at our high ropes course. This is a bit of a repeat from last year, but last year we focused on the whole course while today is just about zip-lining," Jared explains. "I want to thank you all for a great weekend thus far. I know the media that was here yesterday got some great shots and the camp will receive some great publicity out of it."

"The high ropes, again?" Castle whines. "Really?"

"Ah come on, Castle," Beckett says, elbowing him in the side. "You survived last time."

"Only because I was so focused on what you promised me I'd get afterwards."

"You mean the sex?" she asks, raising her eyebrows.

He shrugs sheepishly as the group starts to head out to the course.

"Okay, this time focus on what we'll be doing at the Hamptons next weekend. Make it through the rest of this course, and the rest of the week, and then I am all yours."

A devilish grin spreads across his lips and she just knows she's in for a hell of a weekend starting next Friday. She just hopes she doesn't get tied up at work with a case.

"So what's it going to be this year?" Esposito asks, catching up to them. "Another bee sting? A mosquito bite?"

"I don't know what you're talking about," Beckett shrugs, even though she definitely does.

"Right," Ryan laughs, joining them as well. "You don't remember because you plan to use the same excuse so you and Castle can sneak off again like last year."

"Go ahead," Esposito says. "See if it works this time."

"Calm down, boys," Castle says, walking backwards so he can look at them. "We're not sixteen. We have our hormones completely under control."

"Does that have anything to do with the hour long shower Beckett took last night?" Esposito smirks.

Beckett groans, bringing a hand up to rub at her temple.

"You know, now that you mention it," Ryan starts, "Castle was gone for a pretty long time last night too."

"Hmm imagine that," Esposito says looking between the two.

"That doesn't prove anything," Castle says, still walking backwards. "Just because we were both gone doesn't mean we were together. It doesn't even mean that we left at the same time. You have no proof."

"True, but that kind of sounds like a confession to me," Esposito shrugs.

Beckett tugs on Castle's arm, stopping him from tripping backwards over a large fallen tree limb. He looks down in confusion at her action, sees the limb, and thanks her.

"It's pure hearsay, Espo," she says. "It won't hold up in court."

"Okay now I know you two were together getting freaky last night!"

She raises an eyebrow at him. "Can you prove it?"

He exchanges a glance with Ryan who just shrugs.

"Have fun with my paperwork boys," she smirks, pulling Castle on ahead. "I'll be in the Hamptons next weekend. And we're taking the Ferrari."

"I still can't believe we pulled this off," Castle says as he pulls his Ferrari into his Hampton's garage.

"It's been a whole week, Castle. Time to get over it."

"No, but we cheated and we still won. I thought cheaters weren't supposed to prosper."

Beckett slips her arms around his neck as they meet at the rear of the car. "Oh I'm sure we're going to pay for it somehow. They know something happened that night, but without proof…But enough about them. This weekend is supposed to be about us and our anniversary."

"Right, right, of course," Castle says, dipping his hand into the bag slung over his shoulder. "Shall we start the weekend off right with these?"

Her fingers reach out to grab the black lace dangling from his fingertips. She notices they're a bit heavy for regular underwear and that's when she notices the little bullet vibrator tucked inside.

"We're actually doing this?" she asks.

He sticks his lower lip out in a pout. "You said –"

She laughs, stuffing the lace in the back pocket of her jeans. "I know what I said."

He stops pouting and draws her back into the circle of his arms. "So what do you think about this? You go put those on, we go out, have some dinner, a couple drinks, and then we come back here and get those handcuffs of yours involved."

Beckett hums, stretching up to kiss him. "I think I'm glad that I'm aloud to touch you now."

She pulls the lace up over her hips and wiggles around to get the bullet in the right place. They really do look like a normal pair of underwear. She spins in the mirror, admiring how well the lacey trim accentuates the curve of her ass. But then Castle pushes the button on the remote. Startled, her arms fly out to grip at the doorframe. She hisses as he pushes the button again, turning the speed up.

"I'm just trying to get you ready for tonight," he explains calmly. "You need to practice hiding your reaction better than that."

He flicks the vibrator off and she relaxes.

"I'm going to kill you."

He grins, shoving the remote into his pocket. "Not if I kill you first."

She's on edge all evening, anticipating the moment he'll choose to flip the switch. She flinches every time she sees him reach into his pocket, but nothing ever happens. Beckett starts to think that maybe making her wear the vibrating underwear with the knowledge of what he could do to her in public is enough for him. But as they sit to wait to be seated at their table at the restaurant, her hips pitch forward as the bullet in the underwear whirs to life.

She breathes out through her nose, her hands gripping either side of the whicker chair. Beckett looks over at Castle to glare at him, but his eyes are focused on the aquarium of fish to their right. His hands are resting casually, innocently, on his thighs. She starts to roll her hips into the vibrations without thinking, her instinct and desire taking over. Her eyes slip closed until she suddenly remembers exactly where she is. She scans the waiting room of the restaurant for anyone watching her, but no one is. Then the vibrations stop.

Beckett settles back against her chair, trying to return her breathing to normal. Castle turns his head to look at her, a stupid grin on his face. She glares at him before picking up their buzzing pager, signaling that their table is ready.

The hostess leads them to a table, practically in the center of the restaurant, and Beckett just knows he did this on purpose. She sinks into her chair, beginning to wonder why she agreed to do this.

"Having fun?" Castle smirks.

"You are so going to pay for this later," she hisses.

"Don't think so," he says, shaking his head.

"Oh yeah? And why is that?"

"Because you're going to be the one in handcuffs."

A shiver of arousal runs through her at the thought. He has complete control of her tonight and fuck if that doesn't turn her on even more.

The waitress comes over to take their orders when the vibrations start again.

"I'll have a glass of your ahhhh," she cuts herself off midsentence without trying to.

The waitress looks at her in confusion. "Is everything okay, Miss?"

"Yeah just uh…cramps," Beckett stammers.

"Whoa, I don't need to know about that," Castle says, shaking his head.

She tries to give the waitress an apologetic smile, but it looks more like a wince as the vibrations increase. She kicks Castle under the table.

"Okay so um I'll have a glass of your pinot and the filet medium rare with the steak sauce on the side," she says in a rush.

Castle raises his eyebrows at her, a smile tugging at his lips. "Why are we talking so fast, Beckett? Somewhere else you need to be?"

Her eyes follow the length of his arm into his pocket. She needs to get that remote. She needs this to stop before she comes very loudly in the middle of this restaurant.

"N-no," she answers, her voice pitched higher than usual.

She can't do this. She can feel her eyes threatening to roll back, the beginnings of an orgasm starting to take hold. Beckett digs her toes into Castle's shin under the table, pleading with him to turn the damn thing off. Instead, she's greeted with an even faster speed of vibration and she audibly gasps.

"Are you sure you're okay, Miss?" the waitress asks again.

"I need to go…over there."

She brushes past her, headed for the solace of the ladies room. She starts to break before she's even made it past the threshold. Beckett grips onto the counter to steady herself as her eyes slam shut and her orgasm builds. She's almost there, she can feel it in the way her stomach starts to contract, and her thighs shake. But then the vibrations stop again and she turns to see Castle standing with that same smug look on his face in the doorway.

Kate lets out a frustrated groan, tossing a soap bottle at his head. He chuckles, ducking out of the way.

"I love how upset you get when I'm edging you."

She stomps over to him and pulls on the lapels of his jacket. "Make me come. Now."

"That's not how it works, Kate."

"Push the damn button or will I go out there and make a scene about there being a man in the ladies room. You'll probably get kicked out of the restaurant."

"Can't do that."

She starts to storm past him, when he grabs her wrist, pulling her to a stop.

"Do this now and you'll severely pay for it later," Castle says into her ear.

"I really hate you right now," she grits out, heading back to their table.

"You love me," he calls after her.

It's not until they're stuck in traffic, headed to his favorite Hamptons bar, that she starts to feel the vibrations against her clit once more.

"Really? Here?"

"It's not like we're going anywhere."

He pushes the button twice more, skipping right over the medium speed and up to high. Beckett grips at her seat belt until her knuckles turn white and her eyes slip closed. She lets herself moan now, knowing that only Castle can hear her.

"You did very well tonight," he tells her, stroking her thigh. "I don't think anyone suspected anything."

She's too far gone to respond, her body already shaking with the promise of release. Her hips start thrusting forward in her seat, trying to push the bullet against her clit harder, needing that extra fiction to send her over the edge. Castle reaches over and unbuttons and unzips her pants, sliding his hand down her outer thigh and directly over her heat, being careful not to disturb the vibrating bullet. He pushes the lace to the side, and curls two fingers inside of her.

That does her in. She screams, her head falling back onto the head rest, as her hips buck violently against his fingers. She squirms, trying to get away from the intense vibrations on her clit, but to no avail. His fingers continue to move inside of her and she feels herself building up again.

"Fuck, Castle," she curses.

Her second orgasm rips through her, even more intense than the first. In fact, she's pretty sure he gets her to squirt. Thankfully, Castle finally switches the vibrator off and withdraws his fingers. She opens her eyes slowly, watching him suck her juices off his fingers.

"I hope you have an extra pair of pants," he tells her. "Yours got a little wet."

Beckett looks down. "It's been a while since you've made me squirt," she says, still breathing hard.

"You only do it when I edge you. And you're too impatient to let me do that often as we were both reminded of last weekend."

"Maybe it's time you taught me a little patience."

Castle hums, tracing his fingers up her inner thigh. "Be careful what you wish for, Beckett. I have no qualms about making you beg."

She feels the arousal curl in her stomach again. "You know, since it looks like I peed myself, thanks for that, maybe we should just go home. We have drinks there and we can do…other things."

The traffic starts to move forward and he flips on his signal to get in the other lane.

"The two orgasms you just had not enough for you?"

Her fingers skirt along the edges of his thigh, brushing against the hard bulge under his zipper.

"I'm only thinking about you here."

He groans at that, getting someone to let him in so he can get off at the exit.

"Happy Anniversary, indeed."

Castle secures her wrists in the cuffs, essentially chaining her to the bed. He wonders why they haven't done this sooner, because he is so turned on right now.

"Those too tight?" he asks, sitting back on his heels between her legs.

She shakes her head, her hair fanning out on the pillow. "No, they're good."

He shifts his weight forward again so he's hovering over her and bends his head to kiss her. He can still taste the wine on her from dinner. And there's a smidgen of steak sauce she missed on the corner of her mouth that he happily licks off.

He cups her face in his hands and she chews on her lower lip as she stares up at him in anticipation. Castle smiles and brings his lips back to hers before kissing his way down her jaw line and over her neck. He places a kiss against the fading hickey from last weekend, and then lets his mouth travel down between the valley of her breasts. He takes one of them into his mouth and she mewls, her hips already bucking against him.

"I thought this was about teaching you patience," he growls, releasing her from his mouth.

"Being patient is boring," she retorts.

Castle grins and goes back to work sucking on her other breast. He moves lower, painting a line with his tongue down her abdomen and across her pubic bone. After the vibrating underwear, she's not sure how much more her clit can take, but that doesn't stop him from assaulting it with his mouth.

She pulls at her restraints the instant his mouth lands on her swollen nub. She tries to escape his mouth, but he grips at her hips, holding her in place. Beckett whimpers as his tongue works her over, trying desperately to wiggle out of his grasp. The overwhelming sensation starts to turn into an orgasm when he pulls away and kisses his way back up to her mouth.

He holds a finger over her lips as she starts to protest. "Patience, Beckett."

Castle positions himself over her entrance and enters her in one swift thrust. She tugs at the handcuffs again, this time wanting to dig her nails into his back as he pumps into her. They both moan and curse as he picks up his speed, driving into her with punctuated thrusts. Their hips roll together as they build up their orgasms. They come nearly one right after the other, both of them breathing hard.

Castle reaches up to release her wrists before he collapses onto his back beside her.

"Next time," Beckett pants, still trying to control her breathing. "I'm putting you in the cuffs."

AN: I borrowed and tweaked one of my tumblr prompts for that underwear scene, because I'd already written it once and wasn't sure if I could top myself. El fin.