Tentacles and Skeledongs

NSFW/18+ only. Mostly reblogs. Roleplays are currently closed. Most of the content is not tagged currently, so browse with caution. My main blog is: unfoundedrobotaccusations and my fanfic/ SFW Undertale blog is: vex-bittys.

[vexy-sins]

Just a reminder that this blog does have adult content which is not tagged because of Tumblr's weird policies.

This means that you may see untagged posts which contain fontcest or selfcest ships as well as possible noncon or dubcon content. Please browse with caution.

Writing will always be tagged with content warnings, and you can always ask if you have any questions.

[reignbeaux13-deactivated2025051]

[button-tale]

I made Bitties that you guys can adopt.

Keep reading

[velvetwyrme]

👀✨!!

(18+ version + oneshot is also up on my Ao3 ;]!!)

[skull-otaku-deactivated20231105]

Man, your drawings are divine!!! I cordially ask you to draw Fell!sans, because he looks amazing in your style.. <//3

Sadly, I didn't have time to draw a request T.T So I'm giving you Fell sans that I haven't uploaded yet. It's the first painting I ever painted of him!! I hope you're satisfied :3

[roxxayne]

Horror for u simps 👍💦

Horror belongs to Sour-Apple-Studios You belong to Horror

[vexy-sins]

Monster Fucker Tip #97:

Make sure your werewolf boyfriend knows the difference between "not in my hair" and "knot in my hair."

[vexy-sins]

Nightmare and the Gang: Ass Kicking

The Bad Sans Gang is hanging out at the castle, celebrating a recent victory over the Star Sanses.

Killer, gloating to Cross: You should ask Dream how his ass is doing after we kicked it so badly in our last battle.

Cross, thoughtful: It tasted fine last night.

Killer: What?

Cross: What?

Nightmare, from his library: What?!

[vexy-sins]

Kinktober 2019: Day Eleven

Pairing: Horrorcest (BloodSugar)

Featured Kinks: Anal Pounding, Anonymous Sex

Additional Warnings: Sex Toys, Light Spanking, Rough Sex, Creampie

----------

Papyrus regularly threw anonymous hookup parties exclusively for the monster community, and the parties always drew a massive crowd of both regulars and newcomers looking to unwind with no strings attached. This party topped all of its predecessors though. Papyrus had rented out an entire club venue, letting the thumping bass of the music and the strobing colored lights assist the monsters in attendance in keeping their identities a secret.

Blood, who once called an alternate universe known as Horrortale his home, never would've considered himself a party guy, but with sexual tensions at home rising to levels that even a skeleton with no lungs would consider suffocating, he decided to give an anonymous sexual encounter a try. Thankfully, Papyrus prepared his sensual soirees for all levels of experience with small cards bearing instructions laid out right at the entrance.

WELCOME TO THE GREAT PAPYRUS' EQUALLY GREAT ANONYMOUS SEX PARTY, the card read in embossed, gold-leaf capital letters. PLEASE HELP YOURSELF TO A CONVENIENTLY PLACED MASK OR GLOVES IF NECESSARY TO PROTECT YOUR IDENTITY! 

Blood checked the display of masks, choosing one that would hide the hole in his skull. An injury like that would be a dead giveaway if anyone here knew him. Blood's single working eyelight returned to the instructions on the card.

CONSENT IS VERY COOL, SO RESPECT YOUR PARTNER(S)'S BOUNDARIES. NO HUMANS, CHILDREN, OR CONVENIENTLY SHAPED LAMPS ALLOWED UNDER PENALTY OF ETERNAL BANISHMENT!

The levity of the message helped Blood to relax, and he passed through the entrance alcove into the main area of the club with an eager smile on his skull. The heavy bass of the music thrummed through his bones, stirring his magic. It took a moment for his vision to adjust to the dynamic lighting, but once it did, Blood liked what he saw.

Monsters grouped together on strategically placed couches or in shadowy corners in pairs or threesomes, and Blood even spotted a densely packed crowd having what appeared to be an orgy on the dance floor. Small tables dotted the venue with offerings of food, drinks, and sex toys. The scent of sweat and arousal drifted to Blood's nasal cavity as he made his way deeper into the club in search of a partner. He wanted something specific- a Papyrus-type, if he could find one.

Blood prowled through the club, bypassing interested monsters without sparing them a glance. He wanted what he wanted, and he pursued his intended quarry with a singular purpose. He caught glimpses of a tall, slender skeleton that fit his tastes, and the hunt began. The thrill of the chase awakened a hunger in Blood that had nothing to do with food.

Passing the dance floor orgy, Blood spotted his target again. The skeleton made sure they had his attention, then slowly unbuttoned the top of their sexy nurse costume, putting a pair of small   breasts with erect nipples on enticing display. Blood let out a low growl as another group of monsters passed in front of him, blocking his line of sight. By the time his path cleared, the other skeleton had vanished into the sectioned off seating areas in the back of the club.

Blood followed, letting his instincts lead him to the shadowed booths with their plush couches and low tables littered with condoms and sex toys. Blood heard movement; the other skeleton must be back here. The chase neared its end, and Blood's magic throbbed in anticipation of finally capturing his prize.

There.

Blood stepped around a partition and found his prey. The skeleton was bent over the arm of a couch, skirt flipped up, underwear conspicuously absent, and fingers sliding up and down their slick entrance before dipping inside their eager hole. Their other hand worked a dildo in and out of their asshole with practiced strokes. Blood's mouth watered, and his magic swelled, surging against his self control. With the colored lights strobing against the shadows, he could easily imagine this skeleton's ecto-flesh to be his brother's soft coral shade.

Blood let the fantasy consume him.

Positioning himself behind his pretend brother, Blood slapped the firm, curved ecto-flesh before him, then grabbed double handfuls to knead under his greedy phalanges. The sex toy fell from the other skeleton’s hand to be lost to the shadows, and they tilted their hips to encourage Blood to take what he wanted. Blood let his sockets close briefly, imagining different surroundings and his brother’s voice begging to be taken. His cock ached for coral colored ecto-pussy, but this would suffice. 

Blood let his basketball shorts drop to his patellae, smacking the ass again and causing the other skeleton to squirm in pleasure while he palmed his own dark red magic with his other hand. His shaft throbbed, pre-cum oozing from the tip to be smeared along the length for lubrication. Blood didn't have the patience to go slowly, not with a skeleton so similar to his brother bent over and spread open in front of him. 

Blood rubbed the head of his cock against the other skeleton’s pussy lips, using it to part the arousal-slicked folds and nudge at the treasure inside. He watched the other skeleton’s phalanges dig into the fabric of the sofa, and though the music from well-hidden speakers drowned out their voice, his mind easily added a soundtrack of moans and mewls that his own brother might make. 

Spurred on by his thoughts, Blood sank into the wet heat, savoring the way the tight walls dragged against his cock as he forced his way deeper without waiting for his partner to adjust. He couldn't hold himself back; it felt so right, so perfect, exactly the way he imagined Sugar's pussy would feel gripping his cock.

The other skeleton shuddered at Blood's rough penetration, but Blood was rapidly losing his grip on coherent thought. He pulled back for a thrust, and the friction made him growl with pleasure. He wanted more! Blood braced his brother with a bruising hold on each hip and slammed forward. His brother moaned, his whole body vibrating with excitement.

Blood set a savage pace, lost in thoughts of his brother, lost in the desire to pump harder, to go deeper. He wanted to claim his brother’s pussy; he wanted to destroy it, and leave the taller skeleton a dazed slobbering mess beneath him. The more he thrusted, the more magic surged to his cock, thickening and lengthening the already engorged shaft. His thin control was slipping, and in a brief moment of clarity, he worried that he might hurt this skeleton in his fervor.

He should slow down.

He couldn’t slow down.

He was close, so close.

Sugar's pussy stretched to its limit; Blood could feel the slick walls struggling to contain him as his cock dragged and pulled at them. Suddenly, his brother’s spine arched, and his gorgeous body stiffened. Blood's hips bucked into the movement just in time for his cock to be squeezed deliciously by his brother’s orgasm. 

Blood could hear the other skeleton crying out in ecstasy over the blasting music. One final thrust hilted his cock in the fluttering pussy, and he roared, filling his partner with thick ropes of scarlet cum. 

The orgasm did nothing to diminish Blood's lust. He wanted more. His shaft throbbed painfully, milked dry by his brother’s pussy clamping down on it over and over yet still left rock hard and ready for more by Blood’s pent up sexual frustration.

Apparently Sugar felt the same way because he reached back, grabbing his ass cheeks and spreading them apart to reveal a new hole for Blood to wreck, the rim still glistening with leftover lube from the dildo earlier. Blood heard his partner pleading, but the music drowned out the specific words. He imagined his brother begging him to fuck his asshole instead. His overabundant magic surged again, and his already fragile control crumbled. 

Red eyelight blazing, Blood lined himself up. His body burned with a heady mix of magic and desire. Punctuating his every movement with feral growling, Blood shoved his way into his brother’s tight asshole. The entrance dragged at him, fighting every thick inch of his cock and creating maddening friction that only drove him to seek out more of it. He could barely pull back to thrust because his brother’s walls held him so tightly, but he managed.

Panting and drooling, Blood began snapping his hips forward. At first, Sugar tried to push back on the forward thrust, but he soon gave up in favor of letting the waves of pleasure wash over him. Blood's pelvis pounded into his brother’s ass each time he hilted himself, the force hard enough to bruise. The bolts securing the couch to the floor rattled as Blood's powerful thrusts loosened them. Sugar could only hang on for the ride.

Blood leaned forward, adjusting his grip by wrapping his arms around his brother’s waist. The new position, bent over his partner's body, allowed him to get even deeper into the other skeleton’s hot, tight asshole. Blood could feel his brother trembling beneath him and hear the barely coherent praises being screamed despite the music, and it silenced the nagging worries that he might harm his brother in his uncontrolled state.

With another orgasm fast approaching, Blood began rolling his hips, focusing on long, strong movements to eke out every bit of friction he could get. His growls turned into huffs and whimpers, and his body ached for the next release. Somewhere in his foggy mind, an inner voice reminded him to tend to Sugar's pleasure as well. Turning his skull, he spotted a wand-style vibrator on a low table off the side. He snatched it up quickly as his pace stuttered. Switching it to the highest setting, he reached down and touched it to Sugar's neglected clit at the same moment he buried himself deep in Sugar's abused asshole.

Sugar stiffened and squirted all over Blood's basketball shorts, staining them and his own ecto-thighs with their mixed fluids. The movement squeezed Blood's cock, and it pulsed, emptying a hot load of cum deep inside of his brother. Finally satisfied, Blood's cock dissipated, leaving the other skeleton with both their ass and pussy twitching and overflowing with cum.

With his excess magic spent, Blood returned to his senses. He gently helped his partner settle into a more comfortable position on the couch. Small spasms wracked the taller skeleton's body in the aftermath of their powerful orgasms, but they gave Blood a thumbs up to show that they were alright. Still concerned, Blood pantomimed fetching some water, and his partner nodded.

Yanking his soaked basketball shorts up, Blood found his way over to one of the snack and beverage stations where he collected a bottle of water and a variety of snacks for his partner. It made him uncomfortable to think of any monster expending so much energy without food to refuel, especially one that resembled his brother. He shoved a protein bar into his own mouth as he walked, but he kept most of his haul for the other skeleton.

The couch was empty when he returned. After a brief search, Blood concluded that the other skeleton must have left. It was probably for the best. Blood wanted to avoid awkward questions by being home when his real brother returned from his book club; seeing his stand-in brother basking in the afterglow of a thorough pounding would have tempted him into an encore performance. 

Leaving the snacks and water in case the other skeleton came back looking for them, Blood teleported home and collapsed onto his mattress, exhausted but satisfied. 

He couldn’t wait for Papyrus' next party.

----------

Sugar breathed a sigh of relief when he stepped through the door into an empty living room. Thank the stars, his brother must be upstairs sleeping, the lazy bones. He hated lying to his brother, and making up details about a book club that didn’t exist was difficult. With his brother out of sight, he wouldn’t have to worry about his stilted gait raising brow bones. He wouldn’t need to make a mad dash to the shower before the scent of sweat and sex on him attracted Blood’s attention or risk more cum dribbling down his ecto where his brother would surely see it.

As much as he hated sneaking around, Sugar really couldn't wait for Papyrus' next party.

READ ON AO3

DAY TEN | INDEX | DAY TWELVE

[entryno17]

GOD EVEN THE MAILING LIST HAS BONUS DIALOGUE!!!

[vexy-sins]

*Papyrus hasn't decided what the "d" is used for yet.

*Sans is giving away "P" for free.

[vexy-sins]

Nightmare and the Gang: Killer, no

Nightmare: Killer, you wound me.

Killer: Emotionally?

Nightmare: No. Physically.

Nightmare: With your knife.

Nightmare: The one you stabbed into my tentacle.

Killer (sheepishly): Sorry, boss. You know my love language is stabbies.

[vexy-sins]

Nightmare and the Gang: Fuck, Marry, Kill

Nightmare has captured the Star Sanses. He has them tied up in the antechamber of his castle. He decides to play a little game with Cross to test where his loyalties lie. Cross enters the antechamber.

Nightmare: We’re going to play a little game. You get to choose the fate of the Star Sanses and deliver it by your own hands.

Cross: ‘K

Nightmare: The game is called Fuck-

Cross: Dream. I choose Dream.

Nightmare, exasperated already: You didn’t let me finish. It’s called Fuck, Marry-

Cross: Dream! Still Dream!

Dream blushes. Nightmare facepalms with his tentacles.

Nightmare: The game is Fuck, Marry, Kill.

Cross: Oh, Ink then, but do I have to marry him too?

Ink: Hey!

Nightmare, losing what little patience he has: You fuck one, marry one, and kill one!

Cross, nodding: Oh, easy. Dream, Dream again, Ink!

Ink and Blue: Hey!

Blue: I’m fuckable!

[vexy-sins]

Kinktober 2019: Day Ten

Pairing: UT!Sans x UL!Sans (ClassicLust)

Featured Kinks: Bondage, Frottage, Cock Worship

Additional Warnings: Oral Sex, Hand Job, Mild Orgasm Denial

----------

Sans agreed to try bondage for the first time without much coaxing. Being tied up meant not having to move, right, and not having to move was the laidback skeleton’s favorite activity, especially during sex. He just wanted to lounge and let his partner pleasure him, and hooking up with the Sans from Underlust guaranteed 100% satisfaction on all pleasure transactions. Those Lust monsters were the Energizer bunnies of producing orgasms. They just kept going and going and going…

Actual bondage differed from what Sans imagined though. Lust wouldn’t be satisfied with some simple handcuffs attaching his lover’s wrists to the bedposts. Instead, the flamboyant monster arrived at the hotel room they’d rented in his universe (the innkeeper charged an hourly rate, and nobody asked questions) with a box full of cuffs, straps, ropes of various materials and thickness, gags, chains, blindfolds, spreader bars, and equipment that made Sans question his entire foray into this universe. 

“don’t worry; we’re only going to use the things you feel comfortable with,” reassured Lust, possibly responding to his counterpart’s nervous shuffling, or perhaps he gave the same disclaimer to every monster he brought here. “we’ll discuss some safewords too in case you’re unsure, uncomfortable, or want to stop. using ‘blue’ for ‘stop’ is pretty common.”

Sans nodded mutely, still taking in the bondage equipment spread out before him. "sounds good." Guess we’re really doing this, he thought, removing clothing items and discarding them haphazardly on his way to the bed.

Lust dug around in his treasure chest of bondage equipment while Sans got himself situated, finally fishing out two sets of conjoined padded cuffs with an adjustable strap connecting them. He set them on the floor and grabbed a spreader bar, holding it up speculatively in front of his Classic counterpart. Satisfied with his choice of equipment, Lust strolled over to the bed, still fully dressed, to peruse Sans’ naked body.

With a wicked grin that sent a delicious shiver up Sans' spine, Lust laid down the tools of his erotic trade. “get on your knees,” he instructed, then got to work securing the bindings.

First, Lust positioned Sans' arms behind his back, fastening the lined cuffs to his wrists firmly but not painfully. The matching ankle cuffs went on next, and Lust double-checked the fit a final time before adjusting the strap that linked the two sets of restraints. Finally, he nestled the ends of the spreader bar against Sans’ femurs just above his already trembling patellae, effectively immobilizing him while leaving him open for a bevy of pleasurable activities.

Sans shifted, testing the bindings. He definitely couldn’t move unless he tried rolling, but he had no desire to spend his sexy time face down on a hotel room floor. It truly hit him in that moment that these cuffs and straps left him completely at Lust’s mercy, relying on a single syllable soundwave as his only means of affecting the situation. He wouldn’t be able to touch himself; Lust would dole out, or even withhold, the orgasms as he saw fit. The lack of control thrilled Sans, and his magic began to pool in his pelvis.

Naturally, he cracked a joke to ease the tension. “now that i’m hog-tied, are you going to slip me your sausage?”

Lust chuckled, low and sultry, removing his clothes and laying them neatly on the bondage box before answering. “actually, you’re going to form a nice ecto-cock, and if you perform well, i might even let you pork me.” 

The Lustverse skeleton reached out with deft phalanges and stroked his Classic counterpart’s pubic symphysis, coaxing the rich blue magic into thick, hard cock. With the other hand, he swirled his own magic into plump pussy lips, already glossy with arousal. San groaned and tried to lean forward, but he couldn’t gain any momentum without free use of his limbs.

“lay back and relax,” purred Lust, placing a hand on Sans’ sternum and carefully pushing him backwards against the plush hotel pillows, “we’re gonna have a great time.”

Translucent purple ecto-flesh enveloped Lust’s bones, and every inch of that ecto-flesh rubbed against Sans’ needy cock when Lust backed up until his face leered at Sans from between his femurs. Sans gasped as a slender hand wrapped around the base of his cock, but he couldn’t thrust into it like he wanted to. Why had he agreed to be tied up?

“such a big, thick cock,” Lust moaned, rubbing his cheekbone against it and letting a bead of blue pre-cum streak across his face. Slowly, much too slowly, he stroked the entire throbbing length with one hand, then leaned in, kissing it softly from base to tip before letting his tongue dart out and catch a second drop of pre-cum. “mmm, so good.”

“f-faster.” Lust’s touch and his voice heightened Sans’ desire, but the speed at which he moved his hand only frustrated the bound skeleton. He needed more, but Lust was clearly in no hurry.

Letting more lewd gasps escape his mouth, Lust arched his back and rubbed his breasts against Sans’ cock then lowered his head and ran his tongue along the shaft, swirling it around the tip. “yes, so hot… you’re making me so horny…”

“do something… please,” whimpered Sans who wanted nothing more than to grab his cock and jerk it hard and fast until he came all over those perky purple tits. He couldn’t take all of this teasing, all of the gentle not-enough touches.

Lust pouted, putting a single phalange to his mouth in feigned innocent confusion. “is this what you want?” he asked in a lilting voice. Lust straddled Sans, holding himself above the other skeleton’s cock so that Sans could see the slick arousal on his pussy lips and thighs. ‘you want my tight, wet pussy on your thick, throbbing cock?”

“yes!” Sans’ frustration and desire combined into an unbearable need, the tension building and building with no release in sight, unless Lust would. Just. Cooperate.

Lust lowered himself, still in no hurry despite the fact that he could see Sans straining against his cuffs. Soft purple pussy lips cradled the dark blue shaft between them, Lust’s pulsating opening giving Sans’ cock a sloppy kiss. Lust’s breasts bounced as he rocked his hips, grinding his slick wet pussy along his counterpart’s aching length. He tilted his skull back, let his sockets close, and emitted the most lewd moans he could muster.

Pleasure built; Lust rubbed himself on Sans faster and faster, panting with his purple tongue flopping out his mouth. Sans just wanted to thrust, to sink his cock to the hilt in that tight little hole. He just wanted fuck Lust until the other skeleton couldn’t move. The tension and building pressure were too much. He couldn’t take it.

Without warning, Lust dismounted, standing on his knees between Sans’ femurs. In the same smooth motion, he took the swollen shaft in his hand, squeezed firmly, and began stroking it hard and fast, his hand sliding easily up and down the length now soaked by his own juices. Sans groaned and panted in response, bucking into Lust’s hand as well as he could. 

Pleasure ignited Sans’ entire body like wildfire in his magic, and cum exploded from his cock like a fountain, splattering across Lust’s face, tits, and stomach.

Sans basked in the euphoria of an amazing orgasm, surveying his handiwork. “my work here is done.” He expected a quick chuckle before Lust untied him, perhaps a response to his meme joke.

The seductive, mischievous smile never left Lust’s face. “oh, we’re only getting started.”

The monsters of Underlust were the Energizer bunnies of producing orgasms, after all. They just kept going and going…

Thankfully the hotel charged by the hour, not by the orgasm.

READ ON AO3

DAY NINE | INDEX | DAY ELEVEN

[vexy-sins]

Nightmare and the Gang: The True Homies

(Based on conversations with @damnedxfate)

Nightmare, drinking a cup of coffee from his #1 Boss mug and looking directly at the camera: It’s not gay to kiss your homies goodnight.

(The camera pans out and the audience sees that Nightmare is wearing a shirt with the same words on it. The camera pans out further, showing the Bad Sans gang all wearing identical “I’m the Homie” shirts.)

Axe: Ride or die homies are out. Kiss and care homies are the new hotness.

Cross: Why die when you can smooch?

Killer: Why ride when you can 69?

Dust: It’s not gay to fuck your homies either.

Cross: It’s only gay if balls touch.

Killer: If balls touch, you just say “No homo” and then it’s not gay

Axe: What if you don’t say “No homo”?

Cross: Homies to Lovers

[vexy-sins]

Not sure if this counts as NSFW but in the case that a king and a coral decide to have kids, would the coral carry them or lay them?

*If a King and a Coral were having hatchlings, the King would oviposit eggs into the Coral. Once the eggs absorbed enough magic from the Coral to have soullings in them (1 or 2 days), the Coral would lay his eggs. The clutch would contain up to four eggs with soullings in them (though 1 or 2 is most common). The rest are decoy eggs with a small amount of magic to distract any potential threats from the real eggs.

*The Coral would generally hide his nest well, though his adopter will usually have a pretty good idea of where it is because the two lamias will spend a lot of time making it, and the King will stay nearby to protect the nest and make sure his mate is well cared for. The Coral will want to stay in the nest as much as possible to watch and nurture the eggs.

[voicetail]

Visit Original Link

new audio up - a fellswap comm that’s half as nice, and twice as knotty

let’s see if this gets taken down..

CW//  incest/fellswapcest, noncon, begging, breeding, double penetration, knotting

[blehbybleh]

Edge and mutt fight ⭐

Who will win?

[vexy-sins]

*I say Mutt, but either way, I'll feel like a winner watching.