A/N: And here it is, the final chapter. Thank you for taking this amazing journey with me. Your support has been such an inspiration! I hope this little story made the winter hiatus a little more bearable! I seriously can't say thank you enough to each and every one of you!

***Please read the note at the bottom for a little surprise. :)***

Disclaimer: I do not own Castle or the wonderful characters used in this story.

Ad Infinitum

Ad infinitum: without an end; to infinity; without limit

"The sweetness of a kiss is not in two lips touching each other,

It's in the feelings that bring and keep them together."

-M.F. Moonzajer

12 a.m. November 10th, 2015

Castle uses the last bit of willpower he has left to pull his lips away from the stunning woman beneath him. She whimpers in protest, but the alarm on his phone reminds him why he pulled away in the first place. He reaches for the device and turns off the alarm before dropping it on the floor beside them.

Round one had been fast and frantic on the couch; both of them already so close to the edge that it only took the slow slide of him into her and the delicious slide out to send her over the edge, pulsing, tight walls ensuring that she took him with her.

She initiated round two as soon as they both caught their breath, but when she'd attempted to reverse their positions they'd ended up toppling off the couch and onto the floor. The laughter had bubbled out of them until she'd felt the insistent press of him against her thigh and the flame ignited all over again. Neither of them bothered to move from the floor as Kate rose up over him and began round two.

She had slumped against his chest after he coaxed a second orgasm from her. He'd only given her a few minutes to catch her breath before he gently rolled her off his chest and kissed his way down her body. And that's how he finds himself, lips pressed against the outside of her thigh, when his alarm alerts him to the time.

"Castle…" she groans when he doesn't return his lips to her skin. Two rounds were not nearly enough for her and she wants him almost more now than she did during round one.

Her eyes are squeezed shut, body relaxed beneath her husband, but when he still doesn't respond to her breathy protest she cracks them open only to find him watching her with a huge smile on his face.

"Castle, what are you…"

He cuts her off with the press of his lips, scorching, sweaty skin sliding against her own until she whimpers into his mouth and insistently rocks her hips against him. He trails kisses from her mouth to the soft, tender skin below her ear and she shivers when his breath coasts across her skin.

"It's after midnight," he whispers, pausing to nip at the skin there before soothing it with the tip of his tongue. "Happy first anniversary, Mrs. Castle."

She uses her right hand to pull him away from her neck, claiming his lips again as soon as he lifts his head. She slicks her tongue over his, and paints words of love into the hot cavern of his mouth until he moans and has to pull away to catch his breath.

"Happy first anniversary, Castle. I'm so glad we made it here." She smiles as she traces her left hand down his cheek, letting the cool metal of her rings press against his heated skin in a reminder that they really did make it to their happy ending.

"There's no place I'd rather be, Kate." He kisses her again before sliding his hands down the long expanse of her body and before she knows what's happening, Castle has lifted her into his arms and placed her gently on the bed.

She grins at him as she pulls him down with her and her left leg hooks around his hip. "Decided it was time to use the bed, huh?" she asks, and he groans at the tone of her voice.

"I did promise to enjoy you on every surface of this room didn't I?" He teases as he kisses his way back down her body, re-positioning himself in the same place he was before the alarm interrupted them.

"Mmm, yes, but you also said you wanted to wait until our anniversary and we didn't quite make it that long," she teases back.

"Are you complaining?" he quips as he slides his hand down her stomach, lower and lower until he can spread her open for him. She's twice as wet now as she was during round one, but her thighs are coated in a mixture of their previous activities and damn if it's not the hottest thing he's ever seen.

He slowly leans in and runs his tongue over her swollen folds, eliciting a moan from her and a quick jerk of her hips.

"Not complaining," she grits out between clenched teeth. "Please, Castle…"

He loves quiet, tender Kate, but he loves needy, begging Kate even more.

The breathy whine of her voice sends shivers through him and he knows that he won't be able to tease her for long; the need to be inside her again is already too much.

He traces his tongue over her swollen, throbbing bundle of nerves and sucks it into his mouth at the same time he slides two fingers into her. She clenches around them immediately, a string of curses falling from her mouth as he curls them inside her and stimulates her G-spot with just the right amount of pressure. She cries out as her body writhes and thrashes beneath him, but just as she's about to fall over the edge he pulls his fingers out and pulls his mouth away from her sensitive bundle of nerves.

"Castle…" she growls in frustration, but it quickly turns into a moan when he slides into her and begins to thrust before she even catches her breath. He immediately sets up a punishing rhythm, pounding into her as if it's the first and last time he'll ever get to be with her. She meets each thrust with the roll of her hips and wraps her legs high around his waist the change the angle.

She cries out seconds before she feels his release and he lets his body cover her own as they bask in post-coital bliss. She holds him against her, unwilling to let go of him or their intimate connection.

"Kate, I'm too heavy to lay on you like this."

"No. Stay like this, please?"

He stays like that for as long as she wants.

True to his word, Castle spends the majority of their anniversary enjoying his wife on the various surfaces of the room. He loves every moment of the day, every moment with her, but his favorite moments come in-between the love-making, when she's sated and happy and draped across his body with a smile on her face. Those are the moments he lives for.

He makes a decision before the final day of their honeymoon, but he doesn't share it with her right away. They'll make it a tradition, coming to Galle and celebrating their anniversary. And each year he'll weave her a beautiful tale of the previous year, remind her of all the things that he loves about their relationship. He'll never tell her, because he loves every moment he spends with her, but his favorite one to tell will always be the year they were blessed with a son. Their story is a great one, full of hardships and happiness, but most of all, filled with love. And to think, it all started with only a handful of words.

"The hands of those I meet are dumbly eloquent to me. The touch of some hands is an impertinence. I have met people so empty of joy, that when I clasped their frosty finger-tips, it seemed as if I were shaking hands with a northeast storm. Others there are whose hands have sunbeams in them, so that their grasp warms my heart."

-Helen Keller

Thanks to another bout of inspiration, I've decided to do a companion piece to this that will follow Castle reading Kate's journal of her hopes for their future. Stay tuned for this story which will be coming soon!

Thank you, thank you, thank you!

I would love to hear your thoughts! xo