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the-possum-writes · 8 months

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could you do a detailed smut/fluff with adult!Finn after reader has been away on an adventure?

Long time no see 🔞

❥Character: Finn Mertens

❥Tags: NS/FW, gender neutral reader, private parts aren't specified, Face sitting, Oral, Established Relationship, Fluff, Vanilla, No beta,

❥Synopsis: Coming back to Finn after spending months climbing through snow covered mountains. As much as you love traveling, you love him even more.

❥Wordcount: 2400

❥Taglist: @watchingfromthefloorboards @foxpearlwilder

With the treefrort being no taller than a sapling it made it harder to find Finn's mobile home with how much he loves to move around without telling you, but the again, you can't say no to a challenge.

The air is humid, and the sky grows gloomier as clouds block off the day's final rays of sunlight. The trinkets on your backpack clink together as you hike uphill toward the parked metallic trailer, where the candy horses are already preparing for sleep; any doubts about no one being home are thrown out the window when orange light shines behind the solitary door. A single knock is made while speaking clearly. "Sir Mertens, we've come to discuss your expired warranty," you say as solemnly as you can.

Footsteps approach you as a muffled voice talks from inside the trailer. "A warranty? But I paid choose goose years ago." When the door finally opened, Finn was shocked to see you instead of some unscrupulous lawyer. Even in this temperature, he is dressed in just a pair of faded gray tank top and a pair of denim shorts. He is just as you remember, tall, chubby, but neither too skinny nor excessively jacked up, and his blond beard matches the blond hairs on his head that aren't covered by his customary bear hat. However, he appears to be immune to the autumn season since when he greeted you with a bear hug, you felt firsthand how naturally warm he truly is, with his body heat surrounding you even through the layer of clothes you dressed yourself for travels.

After a minute of hugging you, he laughs in your ear and releases you. "I should've known better; lawyers wouldn't bother trekking up this steep hill just to charge me with a stupid warrant."

"You obviously never met a lawyer then, they're more relentless than a honey badger with a grudge." you point out. This gained another laugh from Finn, "Come inside! you look like you've fought one yourself."

And he wasn't lying, expeditions didn't really leave you looking fresh like a cabbage.

As you step inside his cozy trailer you soon realize why Finn was dressed in light clothes, it's just as warm as he is with the orange lights coming from a heater in the corner of the main area that looks like a living room, a few more looks around the place hold the trademarks of a single occupant, empty pizza boxes stacked together in the trash bin, clean but unfolded laundry basket out in the open and countless trinkets, weapons and treasures mounted on every inch of the walls. You drop your backpack to the carpeted floor as you take in the details of the treasures, some look familiar to you while others are completely brand new. You make a mental note to ask about them later for now you only have one thing in mind as you remove your coat.

"I'mma hog the shower bit." you affirm, not really asking for permission but you do toss in a suggestion for good measure. "You could use one too, I may look the part but you smell more like a badger than me."

Finn scoffs at your jab until he caught a whiff of himself and agreed non verbally. The last thing you saw before closing the door to the bathroom was Finn grabbing two towels from the cupboard but not a pair of new clothes considering the basket was right there, it sent a shiver down your spine and settled in your stomach, but you choose to ignore it for now as you get your priorities straight.

The sigh you release when the warm water crashed on your body could easily be confused for something pornographic, but considering the rough terrain you've traveled through and the rough weather outside it's no brainier you'd feel so satisfied with something as mundane as a hot shower. Your hands are combing through the knots in your hair when you heard Finn follow you into the shower, you step aside to allow him some room under the shower head as he shakes his head like a dog. "Can you pass me the shampoo? it's on the sink." he asks, eyes closed as he lavishes in the hot water just like you did earlier. You poke your head out of the shower curtain to retrieve the bottle on the ledge of the sink, almost laughing your ass off when you read it's one of those '13 in one for men' brand. "For real? why not have a shampoo and conditioner like Jake did?" you snort.

"Hey, I'm a busy guy. Why waste my time with a ton of bottles if one has it covered?" is his defense, but you comply nevertheless as you squeeze the shampoo over his open palm as he washes his rowdy blond locks with it, you can't help but feel a twinge of jealously, Finn could use car shampoo and his hair would still look majestic and soft. Good genes i suppose. Your eyes went to the single hand washing his hair with his other shoulder leading to a scarred stump you've seen replaced with a multitude of weapons and robotic prosthetics but now it's just as nude as the rest of him. He helps you out with your own hair, scrubbing your back and even cleaning behind your ears like a cat grooming it's partner, and yet you allow him, let him satiate his touch starved need with these caresses on your body that don't necessarily lead to anything promiscuous under the shower head but knowing the two of you it's just a matter of time. He's the first to walk out of the bathroom, handing you your towel as he dries out his long hair in his bedroom. While you follow behind his steps it's like walking in on an undisturbed nymph bathing in a pond during golden hour, with the orange light casting striking shadows and highlights over every noteworthy angle on his body, from his sturdy thighs to his firm shoulders and lastly his prominent ass, it's like you're hypnotized when you slowly walk up to him to wrap your arms around his midriff and press your exposed body to his. "So, what did you bring me from your trip?" Finn asks softly while lowering his hand to meet with yours, caressing your scarred knuckles with his large thumb.

"Since when am i obligated to bring you stuff from my trips? there's not exactly any souvenir shops on top of freezing mountains." you jest, resting the side of your head against his back as your other hand trails up and down his hairy navel, feeling his muscles tense down south.

"You always bring me something," he snorts, "Either way, I'm glad you came back safely."

Finn tosses the wet towel elsewhere as he turns around to face you, expediently but suddenly smashing his lips against yours with a fervor you've only witnessed when he's fighting monster taller than himself, he doesn't leave any spot of your mouth untouched with drooling dripping from the corner of your mouth as you caress his tongue with your own in a cacophony of grunts and gasps that escape past your hot breaths. Finn drops himself back into the edge of his bed and brings you along with him with the only thing keeping you above him being your knee in between his parted legs, if his body is naturally warm like a radiator then the growing length nestled in his loins is overbearingly hot, you raise your knee to tease more of him in an attempt to seek more of the noises that were getting caught in his throat. Seeking more from him, you quit the teasing and get down to your knees, kissing the interior of his firm thighs as you make way to the bulbous pink tip eagerly twitching in your direction. You place one smooch on Finn's tip, before placing another, and another until you take his entire gland past your chapped lips, humidifying them with the droplets of precum slipping through his head as you take more of him with a needy groan.

Finn fidgets a bit in his spot, you raising your view to see him lovingly staring back at you through his gorgeous blonde eyelashes, compelling you to take more of him as you keep eye contact so the memory of you stuffing your mouth with his cock becomes engraved in every cell in his brain. Finn's mouth opens up ever so slightly to expel sighs, grunts and whines every time you bob your head up and down, focusing on the way your tongue swirls around his tip like a lollipop. He's so painfully close it has you aching for him more than all those nights you spent alone on snowy terrain, so you removed yourself from his cock with a final slurp and an audible pop, leaving behind a mess of saliva dripping down your tongue. "...ah, ah, not yet." you insist, ignoring your pained knees as you stand up in front of Finn, softly pushing him on his back as you climb him like a tree.

Almost as if he read your mind, Finn grabbed hold of you with a single hand. "Come here," he pulls your hips to his face, stuffing his mouth with everything you could offer to him. You gasp in bewilderment as Finn takes in as much as he can in his own mouth, sucking, nibbling and letting his tongue run wild all over you as your body instinctively jerks back and forth while tugging on his blonde hair. The action has Finn growling from under you, with his own hips jutting forward even though there's nothing to rut against, Finn has learned to become a patient man when it comes to his urges but it's like the build up from months without any lewd contact finally went to his head and has him tapping into a lustful state. And boy, you're all in for it. You remove yourself from Finn's face, ushering the most basic english through needy pants. "Need you inside, now."

This has Finn tossing you to your side, keeping you in place as he dips his head in between the crook of your neck and shoulder to lick and bite to his pleasure. He guides his fingertips to the opening of your mouth, letting him wet his digits with the excessive saliva pooled in your tongue as you got his fingers nice and wet. It's in your best interest after all. "That's it babe, i need 'em nice and slick, I want you to take me... all of me..." he whispers in your shoulder. After he's satisfied with the copious amount of drool he guides them to your already wet opening (thanks to his own saliva from earlier) and slips in one finger after another, poking and prodding inside you as he stretches you out a bit. His touch has every nerve in your your legs twitching, growing accustomed to the isolation and lack of his touch after all this time has you whimpering like it's your first time with him, and Finn dwells in this. "Missed me after all huh? or did you miss my cock?" Finn replaces his fingers for his hot rob, rubbing the tip over your entrance in a teasing manner just like when you rubbed your knee against him.

"Everything. I missed everything about you Finn-" you confess absolutely breathless, taking his mouth for another kiss as his slips himself inside you, with both of your grunting in unison.

"I missed you to," is the last time you hear him speak in a soft tone. "...Won't keep you waiting." Finn's voice struggles to sound coherent as he secures his arm around your midriff as he drills into you from behind, already starting with a rough pace as he keep true to his word like the knight he is. Your cries of ecstasy combine with his own mix of grunts and growls, even biting into your shoulder to add more marks to the growing collection on your skin. Finn didn't stop his onslaught on your for a second, not when he switched your positions and laid you on your back as he raised your legs over his shoulder to fuck deeper into your wanton body, taking in all of his rough biting that you returned with long scratches on his already scarred back, the angle not only allow for deeper thrusts but it also gave you a beautiful view of his gorgeous body. Just like the treasure mounted on his wall, some of his scars were familiar while there were new ones to the collection, one of them being the unfinished tattoo decorated over his beefy hairy chest, you run your hands over his torso, feeling the muscle underneath flex with every movement Finn provides both for your pleasure and his love for you. It's these touches of yours that has Finn slow down from his heated session against your lower regions to dwell a bit in the feelings that have you two in this situation in the first place, his thrusts become slow and shallow, taking the time to release his hold on your thigh to grab your hand and kiss your knuckles which although were scarred and calloused they felt soft against Finn's lips.

The moment is tender in it's own right, and yet it doesn't fail to have you craving for this silly man all over again. You nudge him with the sole of your foot, silently prompting him to continue.

Finn resumed his onslaught into your warm insides but with more adoring looks and complements that remind you that you're also worthy of his love and attention. "You're taking me so good... No one else can rile me up like this..." Finn calls out your name multiple times, feeling himself near the edge as his hips loose rhythm in favor of faster and harder pelvic thrusts that feel like he's straight up rearranging your guts.

"Finn, Finn please...please..." you find yourself begging, almost teary eyed.

Finn complies and smooches you one last time, driving you to that sweet sweet liberation that has you aching your back and wrapping your legs around Finn's waist, meanwhile he releases a combination of desperate whimpers and grunts as he empties a vast amount of pent up come inside your tight little hole that rushes out from around him and leaks into his bed sheets. The blow up has Finn crashing down on you, needing to tap him in the arm to remind him he's crushing you.

"My bad." he rolls sideways but not without pulling your against him, as he closes his eyes to take in the feeling of you body against his no matter how sweaty the two of you are.

You in return, appreciate his peaceful face from up close. To the scar on his cheek from the beard scattered over his lower jaw, he's marvelous, not to mention when he finally opens his eyes to look at you with those glistening pools of blue. "Like what you see?" he jokes, smiling at you despite the few missing teeth.

"Very much," you place a kiss on his nose, watching him scrunch it a bit.

"Well, if you stay for the weekend i can make it worth your time before you go back to mountain climbing." he states, which has you reconsidering.

"Hmm, actually i think I'll take an indefinite hiatus from traveling. Or atleast until i can get you something better than this dinosaur tooth i brought you." you accidentally slip up which has Finn sitting up with a knowing laugh of victory.

"Hah! I knew you brought me something!"

#adventure time x reader #finn mertens x reader #finn the human #finn the human x reader #reader insert

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