Oh Jesus help me

*Sans and Paps are in heat*

Sorry not sorry

Gaster grunted through the cloth gag as he fell on his knees, shuddering and huffing slightly as he was out of breath, dressed in his usual white turtleneck, black coat, pants and dress shoes, he had some new 'accessories' on. A bright orange collar with a blue leash, the leash was held by none other than his youngest son, despite being shorter than him, Papyrus, and a pair of fuzzy orange and blue cuffs that held his hands behind his back. But also not his Papyrus at the same time.

Papyrus stood behind him, leash in hand, with a smile on his face, not the usual smile but one different, one he had never worn before but he didn't mind. There was a reason that smile was there after all.

Sweat started to form on his skull as he saw his older yet shorter son walking towards him, his signature grin on his face but hiding something behind those pearly whites.

"Sorry Gaster." He said while unzipping his hoodie, showing off his white T-shirt.

Both of them were acting. . .different, and not in a good way. Their behavior was actually noticed a few days ago by Frisk when they said they were acting 'weird', Gaster took it upon himself to find out what was wrong with his boys even if it killed him, and it wasn't until yesterday that he discovered what it was that was making them 'different'.

"It's just. . .Papyrus and I are in heat. . .and we got tired of waiting for you to help us." He walked closer to the taller male, making him flinch.

When he came to that conclusion he tried his best to 'help' them (without physically interacting with them or getting involved in the activities of course) with this natural occurrence but nothing he did seemed to be working. The brothers decided to take matters into their own hands and made a plan, Sans was to prepare the room they were going to use and the necessary 'tools' while Papyrus was to capture him, both effectively doing their assigned jobs well. And without detection or suspicion might I add.

"You understand. . .don't you Daddy?" He said cupping his cheek, Gaster's eyes opened wide in fear and shock seeing the look in his son's eyes. He was in deep shit now.

"BROTHER?" Papyrus grinned as he placed his free hand on his hip, "CAN WE START THE GAME NOW? THE GREAT PAPYRUS THINKS WE'VE WAITED LONG ENOUGH FOR US TO START."

"I guess we could Pap," he backed away from his father, his grin growing wider, "you start though, I have to get our. . .toys ready."

Sans soon walked away with a sway in his step, disappearing out the room but not before winking at him seductively. Papyrus suddenly yanked on the chain, choking his father as he fell backwards, instead of falling on the floor like he expected he fell face first into something soft. . .and warm.

"OHH~" Papyrus moaned. When that happened Gaster realized what he fell on.

Papyrus' crotch.

The tall skeleton looked down at his father, his face in a cute yet perverted smile as he gazed at his face in lust, his face was right on his groin and pressed against him slightly. Gaster was sweating even more now and a soft and almost unnoticeable yellow blush spread across his cheek bones.

" DO YOU KNOW OF THE GAME WE'RE PLAYING FATHER? BROTHER NAMED IT 'BONE FUCKERS', WE'VE BEEN PLAYING IT FOR A LONG WHILE AND NOW WE'VE HIT THE BONUS ROUND," his eyes widened as he started to fiddle with his belt buckle, "AND YOU'RE THE OBJECTIVE," Papyrus pulled down his pants, revealing his long, thick, neon orange member, pulsating and throbbing with need, his member rested on Gaster's face and he blushed even more, "I'M NOT ENTIRELY SURE WHAT YOU HAVE TO DO BUT I THINK IT INVOLVES WHAT SANS AND I HAVE BEEN DOING TOO."

He gently pulled down the gag, tightening his hold on the leash as his father spoke.

"Son, you don't have to do this," he protested, "you shouldn't be doing this, it's wrong-"

"BUT IT FEELS SO RIGHT!" He purred.

"Papyrus, I-GHK!"

His son suddenly grabbed his head, pulling him forward and forcing his dick down his throat. Gaster literally choked on his words as warm pained tears ran down his face from his jaw being opened so fast and so roughly.

"OOH~" He moaned, "SO WARM." He panted as a neon orange tongue hung out the side of his mouth, slowly moving Gaster's head back only to pull him forward roughly on his member. Gaster fought against his binds and made muffled cries against him but that only added to his pleasure. The cuffs were stopping him from using his magic otherwise he would've summoned something by now.

Papyrus grunted as he looked down at his father, his length disappearing and reappearing in his mouth, Gaster's eyes were clamped shut as more tears ran down his cheeks, muffled grunts and chokes came from him as he fucked his mouth. Papyrus suddenly frowned and pulled on the leash once again, forcing Gaster to choke and open his eyes in surprise.

"FATHER I WISH FOR YOU TO LOOK AT ME," he stopped pulling on the leash to let him breath when he saw his eyes starting to cross, "I WOULD APPRECIATE IT IF YOU DID, I WANT TO SEE YOUR EYES~" he purred.

Gaster, unintendedly looked up to him, not like he had a choice anyway, the way Papyrus would suddenly talk when he wanted something would just melt his soul. Though most of the time he used that voice was for a hug or to go somewhere with him, Papyrus was using it on purpose in this situation.

That slippery snail.

"THERE WE GO," Papyrus slowed his thrusts enough to what he thought wasn't hurting him anymore but still kept moving, he looked down at him as his yellow eyes looked back, the tears still coming from sockets as his mouth still enveloped his length, "SO BEAUTIFUL~"

He continued to thrust in his mouth but gentler this time, taking in the sight before him with a smile. Gaster was so confused, yes heat cycles were different depending on the monster and the outcomes vary but there was never a case where the sexual interactions was to involve or be towards a family member. Was it because they were skeletons, being different from everyone else, or was something else going on? His thoughts got interrupted by a low groan from his son, his pace suddenly got quicker and his length was now hitting the back of his throat. The pain in his jaw started to return as he choked out grunts.

"I-I'M G-GONNA-!" A hot thick liquid splurted in his mouth all of a sudden, Papyrus moaned loud and pulled him so his member was well past his uvula, if he had one. Gaster grunted loudly against the appendage as the hot liquid ran down his throat in waves, the taste was sweet but burned his eyes more.

Papyrus sighed in a satisfied manner as he pulled out of his father's mouth, Gaster coughed in painful hacks, coughing up what he refused to swallow.

"That was a big one bro." Gaster whipped his head to the voice, seeing his eldest son return with a black box in his hands.

"IT WAS BROTHER, HIS MOUTH IS SO WARM! YOU SHOULD TRY IT!" He squealed happily despite all the sins he was about to commit.

"Maybe I should~" He licked his teeth.

Sans set the box down and walked to his dad, Gaster tried to crawl away but the leash made him stop short. Sans then pushed him down, straddling his waist with a lust filled gaze, Gaster tried to speak but he was so flustered that his voice reverted back to its glitchy staticy tone, making the scientist curse himself.

"Aw don't worry Daddy," Sans moved more forward until his knees were on either side of his head, "you won't be needing your words while you're here~"

It was only until then that Gaster realized Sans only had a shirt on, only a shirt. A bright blue pair of lips shining in front of him, and not the lips one would find on your head, throbbing and dripping with need, Sans looked down at him with a perverted smile, a blue blush on his face as a yellow one was on his father's.

"Why don't you show me how warm your mouth is, huh?" Sans lowered himself so his lips were touching his.

But Gaster refused. Papyrus may have gotten away with what he did but Sans wouldn't, the soft spot was only for Papyrus. Sans frowned seeing his uncooperative demeanor.

"Oh come on Daddy," he whined, "you wouldn't leave your dear old son to suffer would you?"

He just glared at the smol skeleton, he knew damn well 'dear old son' was a load of bullshit. But he didn't have the time to think of with a comeback as he felt his pants being tampered with. Papyrus fiddled with his belt until he got it and his pants undone, pulling them down to find black and yellow boxers, Gaster shrieked and tried to scurry away but Sans' weight kept him stationary. Papyrus chuckled lowly as he gazed at his father boxers, finding a large bulge in them.

"BROTHER, IT SEEMS LIKE FATHER HAS THE SAME PREDICAMENT AS WE DO~"

"Oh?" Sans looked behind him, seeing what his brother was seeing, "so he does Bro, you getting hard on us Daddy?"

Gaster looked away from them, seeming to find interest in something in the distance.

"SHALL I USE THE RING ON HIM BROTHER?"

"I think that's an excellent idea, it's somewhere in the box."

Gaster watched with curious eyes as he watched Papyrus rummaged through the box for this 'ring', finding it with an 'aha' and heading back to him. His boxers got pulled down roughly, making his member spring out of its cloth confines, he didn't even get the chance to register it before he felt a sudden painful compression, making him writhe under Sans.

"PERFECT FIT~"

"Hehe, I think you struck a nerve Papy. Look," he pointed downwards. Gaster was in pain, that's for sure, but he also somehow felt pleasure. He couldn't explain it, his mind couldn't process an explanation, but his body was showing obvious sign that he liked it. His eyes were crossed and to the back of his head as his mouth was agape, bright yellow tongue hanging loosely from his jaw as hot pants left his mouth, "he's enjoying himself~" he smiled wider.

It was the ring, that tight silver metal ring around his member was making him feel this way, but how? With his mouth still open Sans lowered himself on his tongue, shuddering in pleasure at the contact, but then he jolted hard and almost screamed in pleasure.

Gaster licked him.

"Oohh~" His tongue flicked against his pearl and grazed itself against his folds, bringing this immense feeling from his groin to the rest of his body, "oh sh-shit~" his tongue hung out of his mouth as he grinded on his tongue, moans left him as his tongue licked him more greedily, Gaster's eyes uncrossed and he knew perfectly well what he was doing but he couldn't stop himself. His body was moving on impulse, he just couldn't stop.

Papyrus blushed hearing his brother's moans from his father's doing, his own erection coming back, but he shook his head and reminded himself of his task. The ring he had placed was at his very base, making his member pulse violently and painfully, the bright yellow glow mixing into his orange blush. He took off his gloves and cast them aside, he moved Gaster's legs until they were on either side of his waist. He dragged his index along the underside vein from the tip to the base, making Gaster's legs quiver around him, he smiled to himself hearing him moan. Sans held forward, bracing himself on his hands above Gaster's head, Papyrus was right, his tongue was soooooo warm.

Sans panted hard as he grinded on his father's tongue, his moans from Papyrus' actions sending vibrations straight to his ectopussy. His own tongue hung out of his mouth in pleasure, his tongue felt like silk and the wetness from both of them made his movements more fluid. Sans felt a pressure in his gut, that familiar feeling coming again, he grinded on his face harder and faster, moving his hips in circles. He came soon after, moaning loud in ecstasy as his back arched in pleasure, blue splurted out of him and into Gaster's mouth, he shuddered as he came down from his high, body spasming slightly. He lifted off of his mouth and sat on his chest, placing his finger on his lips when he realized what he was about to do.

"Uh uh uh," he said, "swallow it~" Gaster gave him a glare before reluctantly swallowing the sickly sweet liquid, "good Daddy~"

Gaster watched as Sans stood up on wobbly legs then walk to where Papyrus was, he whispered something in his 'ear'. Papyrus shifted to the side enough for Sans to take his place, he smirked at him as his face got closer to his yellow member, Gaster's eyes widened as he saw his blue tongue connect with his member, sending a sudden jolt up his spine. He moaned loud as he swirled his tongue on his tip, sucking hard he went further down and being mindful of his fangs, smirking seeing his reaction.

He bobbed his head up and down his member, his tongue massaging the underside as he moaned around him, Gaster panted as he fought to keep his eyes open, he was feeling the immense pleasure but he couldn't cum because of that damned ring. After a while he pulled away with a loud wet pop, only to let Papyrus take his place, Gaster screamed at the new mouth around him. He wasn't as tight as Sans' but could take more of him and a lot warmer, he felt like he was going to pass out.

Eventually Papyrus too pulled off but still had his tongue on him, then Gaster's back arch once again, Sans had joined his brother, they were sucking him off at the same time. If Gaster wasn't going to die then he felt like he would now. They kissed around him, their tongues fighting to touch each other while keeping as much contact as they can with his member, Gaster's head felt light and hot as he fought to catch his breath, the bothers weren't making it easy for him, he felt a major pressure in his gut as his member twitch even more. They notice this and sped up their actions.

Gaster came, painfully, not much came out but the orgasm was definitely there.

He panted hard as they moved away from him, smiling wide with pride.

"WOWIE, DAD MANAGED TO CUM!!" Papyrus gleamed.

"I know right, shows how much of a trooper he really is," Sans chuckles, "now for the real fun."

Sans straddled his father's waist, grinding himself on the underside as Gaster looked at him with wide eyes.

"What? You didn't actually think we were done here did you?"

"WE'VE ONLY JUST STARTED."

~To Be Continued~