Chapter Text
This… this had to be a dream. There was no way that this could be real.
Sans, his beloved elder brother, the one monster that was forbidden to him, had just admitted to liking him. Loving him even, and more than that of a brother. That he had been taking special care to avoid Papyrus because of these feelings. To avoid… corrupting him. That alone was better news than Papyrus had ever dreamed of. There was an explanation and even a confirmation.
But now…. now it was somehow even better. Something that not even his lewdest dreams could even conjure. Sans was leaning over one of the high bar chairs, his pelvis up, his shorts just barely hanging onto to his ankle bones – leaving his nether regions completely bare to him. Papyrus was fondling the glorious blue ecto-ass that he had formed, palming the supple magic, feeling its heat and tingle. His hands found the curve of the bones, instinctively pumping his brother’s spine, touching his bare ribs. Sans was doing so well. After some initial discomfort, he had given in, allowing Papyrus to touch him the way that they both had longed for, for so long. And now those noises he was making. Little gasps and groans, quiet moans that he tried to stifle behind his hoodie. They made Papyrus’ mouth water.
But, perhaps the most magical part of this moment that it was formed because of his actions. His actions… the actions of the one and only Great Papyrus! Not Grillby.
Speaking of the flame monster, Grillby sat a little ways from Sans and him. He sat back on one of his more comfortable chairs, one leg idly crossed over his other thigh, and a smug grin on his face as he watched Papyrus prepare Sans. As if he were enjoying the show. Not touching them but still making sure that they were very aware of his presence. Grillby hadn’t done anything physical to help Sans’ magic form, however, he had merely sat back and instructed Papyrus on what to do. At first, it was irritating. Papyrus was simply trying to enjoy the moment, enjoy finally having his brother exactly where he wanted him for so long, and the bartender would interrupt their little bubble, telling Papyrus were to stroke, where to touch and how hard. Papyrus had first wanted to rebel – Grillby had given Sans to him for the night and here he was trying to take him away? However, after a little bit of experimentation, he found that, in the history of Grillby’s and Sans’ relationship that Grillby knew a fair amount about Sans’ body. He knew how to follow the curves of Sans’ ribs in a way that made the little skeleton shiver and shake, knew exactly which bone to touch in his vertebrae to make him release a breathless moan. After a few tense minutes, Papyrus found himself eagerly following Grillby’s orders, much to his and Sans’ delight, and to the knowing smirk of the bartender. Grillby had even given him a large bottle of lube, perfect for wetting Sans’ puckered hole with, and Papyrus’ own, orange member.
As he worked, Papyrus couldn’t keep his eyes off of Sans. The blue ecto butt was glimmering, the shadow of Sans’ pelvis bones behind them. Sans’ member was also blue, slowly dripping pre as it sat, already hard and erect. Papyrus didn’t pay much mind to that though. He was concentrating on the bones that Sans had kept hidden from him for so long. They were so fascinating, much different than his own. The bones were smaller, thicker than his, and looked to be slightly damaged. Luckily, they weren’t overly damaged or even fresh, but there seemed to be signs of old trauma. He ran a finger gently over a mark that looked suspiciously like wires or rope, causing Sans to shudder. His brother had been through so much, so much that even he, the Great Papyrus, didn’t know about.
Papyrus would have to ask him later about everything. Get to know the whole story, know his own brother better.
But now, now he wanted to know his brother much in a different way. He began to slowly press closer to his brother, slowly and deliberately grinding against him, making Sans gasp.
“Do you think he’s ready?” Grillby asked him suddenly, listening to every noise that they were making, watching every move.
Papyrus looked back at him and nodded, before turning back to Sans. He lined himself up with Sans’ hole, feeling the ecto muscle give to let him through. “Yes… I can just about get the head in,” he said. Already his soul was hammering in his chest. He was so close! He could just feel the insides of Sans’ magic…
Sans slowly turned to look back at Papyrus, his skull completely covered in a blue blush. “Paps...? Should we really be doing this?” He looked aroused yet slightly scared. Papyrus found himself wanting to reassure his older brother but a loud sigh from Grillby interrupted him.
“For Asogre’s sake, Sans. Now you say something? I mean, he’s only been fingering your asshole for almost an hour now. Shouldn’t you have said something sooner?” Grillby asked him.
“Don’t worry, Sans,” Papyrus said, pressing a little closer to him and giving his shoulder blade a gentle kiss. “I’ve done this before.”
Sans blinked in surprise, big sockets looking up at him. Oh, that’s right, he never did mention to Sans what exactly went on when Mettaton and Papyrus would hang out together. The robot was more than a little frisky and eager, especially when Papyrus accidently told him…
Well, that’s a story for another day.
“But… we’ve never done anything like this.” Sans whispered to him as if looking desperately for an excuse. “I didn’t want this for you… the shame, the…”
“I want this,” Papyrus told him firmly, finally losing the innocent charade that he had held for so long. “I’ve wanted to fuck you as long as I can remember. I want to be inside you raw. Wanted to take you… and now, in front of your boyfriend, I am going to claim you. I’m putting it in.” He said, slowly breaching Sans’ hole.
He groaned even as Sans squealed. Being inside Sans right now… it was like when he was fingering him and caressing him. It was better than he had ever dreamed that it would be.
“Oh! Oh, my… oh stars!” Sans cried out, hands gripping to the stool, tongue peeking between his teeth. “Papyrus!”
“Sans… holy fuck…. You feel so good…” he praised, still pushing himself deeper into him.
“Papyrus… I… I can’t believe that we are doing this.” Sans gasped, another loud moan escaping him. His cock was positively dribbling now, making a mess of the stool and floor. And, for once, both Papyrus and him just didn’t care about the mess. With a low groan, he pushed him back slightly, finally taking the rest of Papyrus.
“Hah… Sans… oh, Asgore… you just swallowed me up.” he keened softly. Sans… he was so warm inside. His magic so alive, tingling across his rod. “You’re impaled on my cock… you feel so good.” Slowly, careful at first not to hurt him, slowly he began to thrust.
Feeling Sans’ magic move to accommodate him and listening to those noises… stars. This was perfect. His brother right where he wanted him, under him, being fucked by him. Papyrus gasped and groaned as he pressed in and out, his motions being aided by the lube. He was so deep inside of him.
Grillby had a dangerous grin on his face as he watched the two of them pant and move. “Papyrus, do you like being buried balls deep in your older brother? It’s nice, isn’t it? Were you surprised that you could fit your whole dick inside?” He asked the taller skeleton. Papyrus only huffed and grunted at him, concentration on pulling as many sounds out of Sans as possible.
Showing Grillby who the better skeleton was for his brother.
“It’s definitely the biggest cock I’ve ever seen. Isn’t that right, Sans? Grillby purred, looking at his boyfriend. Sans gasped at him, tearing eye sockets showing his pleasure as he nodded. “Did you know that your little brother was hung like a horse? You always did like a huge prick. Especially one that is bigger than mine, huh?” Sans’ eye lights rolled back into his skull, his tongue out as he gasped for breath and moaned, unable to form a coherent sentence. He was dripping with more pre now, steadily dribbling down his own cock and the stool.
The bartender chuckled at their expressions, thoroughly enjoying his show. “Never been fucked so well in your life, have you?”
It was unclear who the question was directed at, and they didn’t care.
“Ohhh Papyrus, Stars you’re so big. I can’t…”
“You like this, Sans? I’m just gliding in,” Papyrus told him, leaning closer to him and panting into his ear. “I’m going to make your ass suck me dry. I’m going to make sure that I fill it with every drop of cum that I can.” He continued to whisper, feeling Sans’ magic get hotter.
Sans keened, loudly. Not bothering to hide his noises. “It’s so good!” he cried out. “Just like that, please Paps. Please!”
Papyrus’ cock twitched at his words, the coil of pleasure deep inside of him tightening, preparing to break open. Oh… oh he had found himself another kink. “Your begging is so hot.” He said, biting Sans’ shoulder blades and beginning to thrust even faster. Panting, his hand reached down and finally took hold of Sans’ cock, jerking it off in time with his thrusts. Sans began to lose his cool. Panting and screaming, he leaned back into Papyrus’ grip and twitched, causing Papyrus to sink even deeper into him.
“Sans… Sans I just bottomed out. I’m about to cum.”
“Cum inside! Please! Cum inside!” Sans begged him, his eye lights bright with need.
With a final thrust Papyrus pushed himself into Sans and felt his own release. His rod twitching, he unloaded every drop of magic into Sans he could, feeling Sans also come shortly after him. His soul warmed at the thought that, even during their first time, they managed to come together. He and Mettaton had never managed such synchronised pleasure.
It had to be another sign…
“Sans….” He whispered to him, letting them both slowly come down from their pleasured highs. “Sans I came so much…” he carefully pulled out, still staying close to his brother and watching his orange magic slowly drip out of Sans’ blue hole. Sans groaned as he pulled out of him, looking back at him. The blue eye lights were in the foggy form of hearts as they looked at him.
Papyrus felt his soul flutter. “Sans…” he whispered.
There was a low chuckle behind them, causing them both to turn and look. Grillby smirked at them. “There we go… Papyrus, did you enjoy your special playdate?” he asked him. “Because it looked to me that you did~”