Undertale Smut

US!Papyrus and Sans x Reader

(Yeah I guess I won't filthy prank you this time, enjoy!)

You were the skeleton brothers' neighbors for a while now, and you got to know them quite well. You've visited them a few times and they did the same to you. They seemed to invite you over once again, and today was the day to come over.

You walked outside, and since they were only next door, you walked over to their house in no time at all. You knocked on their door, but no one answered. "They have to be home..." you thought. "It's rude to leave when someone's about to arrive."

You waited for a few minutes, but to no avail. You grew a little bit impatient and knocked again.

Still no response.

"This is getting ridiculous." you mumbled. You decided to open the door, and surprisingly, it was unlocked.

"Hello?" You called. "Sorry to intrude, but is anyone home?"

You felt guilty for doing this, but you heard faint noises coming from upstairs. You walked up the stairs, trying to be as stealthy as possible. The noises you made out were moans and grunts, and you knew something was going on.

You were a little bit... turned on. It sounded like Sans. His grunts finally got faster and then finished with a loud groan. "I still need more..." he whispered.

"Hold on, I'll give it to ya in a minute, I think I heard someone knock on the door." You could tell that this was Papyrus' voice.

"Shit." You whispered. The door finally opened and papyrus walked out. He looked over at you and looked surprised. "Oh hey (Y/N), I'm sorry about that, I just had to help Sans with something."

"Like what?" You asked.

"Oh it's..." he scratched the back of his skull. "He was in something called heat. It basically means you're really, well..." he paused for a minute. "hot in your crotch and that you obviously need to do something about it."

You were already pretty turned on by the noises you heard in Sans' room. "He said he needed more. Do you think you wanna help?" Papyrus asked. You blushed. You always had feelings for Sans, and now was your chance to help him with what you always wanted to do.

Papyrus led you into Sans' room. Sans' eyes suddenly widened. "Bwah!" he shouted and covered his face with a nearby pillow. You knew he was shy. He pulled his legs together to try and hide his member, but you could see the blue glow anyway.

"Don't worry Sans, (Y/N)'s just here to help. She was gonna come over anyway, remember?" Sans uncovered his face. His blush was all over his face. "Y-yeah, b-but take it easy on me, o-okay? It's my f-first time..."

Papyrus walked over and sat down in front of Sans. "How about this," he started. "Sans fucks (Y/N). She needs to give me something too because Sans turned me on as well."

Your blush was blood red. You nodded. "Come on then." Papyrus said. You undressed. Sans was already intrigued. Papyrus wanted you as well. You blushed deeply and laid down, but your knees were propping you up a little bit so Sans could fuck you without too much struggle. Papyrus took off his pants to reveal an orange member. It was pretty big, but it seemed like it could fit fine. Sans was so impatient. "Can I just start already?" He groaned.

You looked back at him and nodded. He thrust into you so quick. His tongue lolled out because he was finally getting close to his release. He started moaning like a madman, and you did the same.

You flipped your head over and kissed the tip of Papyrus' cock before putting it into your mouth and sucking on it. Your hand stroked the part of his dick that wouldn't fit in your mouth. Sans was already getting close. You could feel his dick throbbing inside of you.

"S-shit (Y/N), you're good at this..." Papyrus praised. You sucked even faster and he let out a loud groan. You were about to reach your climax, and it wasn't long before the brothers would too.

You let out a loud, muffled moan as your inner walls clenched around Sans' dick. This seemed to trigger his release too. Sans' thick cum shot all over the inside of you. Papyrus' climax soon followed, and he groaned loudly as his cum shot inside of your mouth and down your throat.

Sans pulled out of you and you slid Papyrus' cock outside of your mouth. You were all panting heavily and were so tired. You used some of the energy left to swallow Papyrus' thick cum. Papyrus let out a chuckle. "You did great, (Y/N)." Sans nodded and said, "I feel much better now." Papyrus rubbed your head before you dozed off into a deep sleep.

(Friendly's Innocence Level: -∞)