"so, the dreams are getting worse huh?" You nod hesitantly. Sans exhaled loudly as he looks back at the notes on the floor.

You were in a secret basement underneath the skeletons' house. The walls, floor, and counters were completely white, blueprints and notes you couldn't read were scattered everywhere, and a large, strange machine was covered up by a curtain. The ugly green couch you were sitting on seemed out of place. You could see a glowing yellow star near the stairs where you came in. Sans never seems to notice it at all.

You hear Sans slowly open a drawer before closing it again. When you look back up at him, he's staring intensely at the wall. He seems to be contemplating something. "you know nothing about the other timelines?"

You shake your head. Your throat hurts from holding back tears earlier. "The only other timeline I remember was the one before this one. When I fought Flowey and went back home." Sans leaned on the counter. You couldn't tell if he was relieved or even more worried.

He finally looks at you again. The little lights in his sockets seemed smaller than usual. This is the most serious you've seen him in a while. "listen, kid. i know you. i know you wouldn't do anything like that. you'd never hurt a fly. but—"

He stops talking when you both hear footsteps. Someone was coming down the stairs. Sans quickly grabs your shoulder and tightens until it almost hurts. "you're sure you closed the door when you came in?" You nod your head quickly. For a split second, you seem…afraid of him? He lets go of you and starts moving towards the stairs.

The sight of Papyrus at the bottom of the staircase stops him. He is staring, wide-eyed, at the room and the object hidden with a curtain. "BROTHER…WHAT IS ALL THIS?"

Sans rests his hands behind his head as Papyrus walks around the room. "just a weird room i found when we moved here. perfect place to practice jokes. i even have an audience occasionally."

"SANS, WHAT'S GOING ON HERE?"

"nothin'. i just didn't want you to hear my hilarious jokes until they were re—"

"NO SANS." Papyrus kneels down and picks up a blueprint. It's a diagram of the entire machine in the room. Sans' handwriting is all over it. "WHAT IS GOING ON HERE?"

The shorter skeleton puts his hands into his pockets, and literally falls onto the couch next to you. "bro, i have no idea what you're—"

"YES YOU DO! STOP LYING TO ME! WHAT THE HELL IS ALL THIS?!"

Sans' pupils suddenly shrink. There is an awkward silence in the room. After a minute, Sans stands up.

"it's complicated. you wouldn't want to know."

He walks up the stairs without saying another word. He went missing for the rest of the day. You didn't say anything about the timelines or the machine in the room, no matter how often Papyrus kept asking, pleading, and bribing you.

Timelines are a secret you are determined to keep.

Sorry this one was a little heavy, especially with the two of the greatest comic reliefs in gaming history. I promise later chapters will be more lighthearted :)

Please review and tell me what you think! Thanks for reading! :) Prompt #3 is Making History!