Give it a SHOT (Underswap Fontcest)

It's the alcohol's fault!

"Ahh, mm...nnh..." Sans whined and made odd little cute sounds that bothered Papyrus and kept him from peacefully taking his drunken nap. He tried to ignore the sounds and soon succeeded by tuning them out.

          "Papy..." Sans urged, now crawling over his brother. Papyrus laid still, assuming his little brother was coming closer to cuddle with him. That was most definitely not the reason. Sans stopped half way over his tall brother, only sitting on one of his exposed legs.

           "So...hot..." Sans whimpered, beginning to dry hump Papyrus' left leg.

           "Ngh, stop that Sans..." Papyrus whined at him, turning his head to the side and flattening his legs. Sans narrowed his eye sockets and moved up, sitting on Papyrus' covered hips and starting to grind down on him. Papyrus' mind alarmed him that something wasn't right.

          "Wha—Sans!?" Papyrus' eyes shot open and he sat up. Sans grabbed his orange hoodie and balled it in his gloved fists.

           "H-Help me Papy! I'm so hoooot...!" Sans whined like a puppy. Papyrus' face grew bright orange, his whole skull getting hot as his eyes ventured down to Sans' crotch. A small, glowing blue bulge was in his pants. Papyrus looked at his brother's face which was clearly sweating and covered in deep blue blush from being overly drunk, hot and bothered.

           "I-I can't hold back—!" Sans leaned back on Papyrus' legs which were bent up again and pulled his pants down a bit to reveal his hard, throbbing dick. Papyrus' blush turned a deep orange, almost like he was running a fever. Sans started to masturbate right in front of his older brother which didn't help at all.

           "F-Fuck, Sans...I can't help with that, we're brothers!"

           "I-I-I don't care Papy! Help me, please!!" Sans begged. He was so vulnerable, and it made Papyrus' body grow warmer by the second. Sans was unconsciously turning Paps on.

          "...Fine. But you gotta get me hard first..." Papyrus told Sans what to do, and he followed along. Sans rubbed both of his blue-gloved hands on Papyrus' crotch before unbuckling and pulling down his cargo shorts. An orange glow was erupting from Papyrus' pelvis, but there was no organ yet. Sans glided his fingers along his curves, earning a couple soft and needy moans from Papyrus' mouth. Sans rubbed harder and even massaged his pelvis before his ecto-dick exposed itself. Sans drunkly leaned down and used his summoned blue ecto-tongue to lick Papyrus' semi-hard cock, the taste driving him crazy for more. After licking a few times, he pushed the tip of his tongue into the slit before taking Papyrus' length down his throat.

           "Sans, oh god..." Papyrus grabbed Sans' skull, guiding him a bit by pushing his head.

           "Mmph..." Sans mumbled and moaned softly, his blue blush complimenting his blue starry eyes that were looking up with a lustful expression. He used his blue gloved hand to circle around the bottom of Papyrus' shaft, squeezing it as he sucked. Papyrus pulled his hand away from Sans' head and propped himself up on his elbows, watching his brother work. He never noticed his own breathing grew hot and heavy.

          "Papy~" Sans moaned after he pulled his mouth away, now rubbing Papyrus' rock hard cock against his hot cheek. Papyrus panted, puffs of hot air pushing out of his mouth. Sans wrapped both of his hands around Papyrus' girth, squeezing the throbbing shaft. In response to the pressure, Papyrus moaned loudly and closed his eyes, cumming without a warning all over Sans' face, mouth, and even dribbling down onto his blue gloves. Sans stared at him for a moment, almost amazed at how much substance came out. Papyrus leaned back on the arm rest again, panting hard. He put a hand over his face, embarrassed to no end. It only got worse when Sans decided to clean up the cum with his cute little blue tongue.

          "Sans that's-ah!- l-lewd..." Papyrus let out a moan which interrupted his sentence when Sans cleaned off his dick with his mouth.

         "I'll show you lewd..." Sans said ominously as he sat up, the alcohol controlling his actions. He crawled over Papyrus, hovering his hips over his member before winking and sitting down over it. His large, jelly-like magic ass cheeks rubbed against Papyrus' still stiff member. Sans looked up at his brother with his hands grabbing at his hoodie again.

           "Ahh, P-Papyrus...I'm so horny..." Sans moaned, pushing his dick down with his ass. Papyrus reached down, sliding his hands from Sans' hips to his bare ass. Sans flinched at his touch, his voice coming out in a greedy moan when Papyrus' boney fingers dug into his magical flesh when he squeezed his ass. Sans moved into his touch, wanting his brother to touch him everywhere and own him. Paps understood the signal, knowing how Sans wanted to be treated right now. Papyrus' dick was almost throbbing again, eager for action knowing this. He flipped them over, hearing Sans squeak out of surprise.

         "Summon the other one for me..." Papyrus spoke in such a soothing yet demanding tone as he rubbed Sans' dick. Sans pouted. He had no say because it was obvious he was submissive.

          "C'mon Sans, we don't have all night." Papyrus urged, rubbing harder. Sans moaned out, and the next thing Paps felt under his hand was a hot, wet pussy. Papyrus crawled up over Sans, looking down at his face before praising him.

           "Good boy..." Papyrus kissed his cheek then moved back down, pushed his legs up, keeping a tight grip on his translucent thighs and going down on him. Sans watched nervously but trusted his brother completely. Papyrus opened up his mouth and let his long orange tongue roll out onto Sans' clit. Sans shivered and put a hand over his mouth, looking down at Papyrus.

          "Ahh-mmm..." Papyrus grinned as he sucked on the liquid coating Sans' vagina. The only sounds that were swimming around the room was Sans' moans and the slick, wet sounds from the sticky substance Sans was producing. Papyrus pushed his tongue inside of his little brother.

          "P-Paps! I can't! I'm, I'm too sensitive!" Sans moaned, warning his brother that he won't last long. Papyrus didn't seem happy to hear the warning. He lifted his head up.

           "I'm not done Sans, you have to hold on..." Papyrus urged, but mostly demanded. Sans looked at him nervously, trying to hold back an oncoming orgasm.

          "I...I'll try my best..." Sans spoke in a weakly confident voice. Papyrus looked back down, using his hand this time. He slowly pushed in his long index finger, watching Sans jump and pushed down towards the finger. He was so eager. Papyrus went ahead and shoved his middle finger inside, right next to his first one. Sans moaned, wanting to close his legs around Papyrus. Seeing his reaction, Papyrus scissored his fingers inside the small skeleton's blue vag.

          "PAPY!!" Sans nearly screamed as he lost control of himself from Papyrus fingering and scissoring him. With that, Sans came on Papyrus' hand, completely coating his phalanges in his clear but blue tinged, sticky liquid. While letting himself go, Sans instinctively squeezed Papyrus' skull between his thick blue thighs. Sans panted after his amazing orgasm and let go of what was between his legs, but soon noticed Paps' expression. He sat up to talk.

           "P-Papy I tried so hard to—" Sans started to apologize but Papyrus shot him a pissed off glare and crawled over him, grabbing his wrists and pinning them above his head.

          "I WASN'T DONE WITH YOU YET!" Papyrus yelled at him. Uh-oh, looks like the alcohol was at it's peak. This was why Papyrus always took naps after drinking.