[Undertale] Sans X Reader - Repeat, Eternally

Chapter 21~ Gaster, of Jello Induced... Reconstruction?

"Holy [Word Redacted], is that my dad?" Sans asked, his eye sockets wide. He was floating in the middle of the Jello, as it was now up to his head...which meant it was up to yours, as well.

"HEY, UNDYNE, WHAT DOES [Word Redacted] MEAN?" Papyrus asked. Both Gaster and Sans spoke at the same time.

"Papyrus, don't say that word!"

Papyrus looked between Sans and Gaster, unsure of who to listen to.

"So, this might not be the best time to bring this up." Sans said. "I know we're in deep jello... but... you were supposed to be my mother?"

"It's not too late. They still could be." Gaster said, and it left you blushing. There was no way you could have anticipated that, and Sans picked up on it.

"But she's my...significant other, dad."

"You're engaged to another woman, and you speak like that?"

The others were attempting to get out of the jello, and failing miserably.

"Do we really need to have this talk now?" You ask.

"Yes." They say, simultaneously.

"Now that I'm back in existence, we have some things to work out. Not as father and son, but man to man about someone we love."

"But seriously, can this wait?"

"No." They refused to give up despite the fact a jello-y threat was consuming us quite easily.

"I gave part of my soul to have them."

"Well, I spent most of my time with them, which means that I am clearly the one they love the most."

They were really doing this. Now, of all times.

"I guided them. There was never a moment that I wasn't there. Except for when I wasn't."

"Exactly. You weren't. And what does that make you? Not there. They couldn't even see you."

"Yes, they could. Due to the infusion of most of my soul, they could both see and hear me."

"Is this true?"

"Uh....Yeah, it is."

"Well I've kissed them." Sans said. The attack was super effective, as Gaster seemed to shrink. 

"Well, I've touched every corner of their body-"

"In examination!" You yelled. "To keep me alive!" 

"Normally, what happens between doctor and patient stays between doctor and patient, but... I have quite a few stories to tell."

"Gaster, what the hell!" You felt yourself sinking as Jello filled your mouth and vision, but Gaster grabbed onto you and pulled you up with him. 

"See, without me by their side, they would be consumed by the jello."

"This is not the time to-"

Papyrus pulled Sans out of the jello. 

"And what does that mean? That you'd abandon your sons?"

"Both of you....STOP!" Even the jello stopped at your immense screaming. Everything and everyone stopped moving. "Before you fight, let's get the hell out of this jello, okay?! Sans!"

His head snapped to you.

"You're engaged to another woman, dammit! Act like it. Be a man and tell her whether or not you love her, don't just expect me to be an escape for you!"

Gaster snickered.

"Gaster!"

The snicker stopped.

"I don't even know where to start with you. Just because you saved me doesn't automatically make me yours. Even if my life is yours, if you truly cared, you'd want me to have happiness in whatever form that came! Am I just an obsession to you?"

"No...it's not like that at all.."

"If both of you care, then you're going to get all of us out of this damn jello right now! We can have the 'My mom is my lover' talk after we're out of imminent danger!"

"ERM...WHERE EXACTLY DO I STAND IN THIS? IS MY MOTHER MY LOVER AS WELL?" Papyrus asked.

"No, paps. If they were our mother, they'd be my lover and your mother."

"BUT I FEEL SO LEFT OUT... CAN THEY BE MY LOVER TOO?"

"No, Papyrus." Gaster said. "We already have enough issues with me and Sans." 

"AWWWW..."

You had a good idea. A perfect idea.

"Hey, Papyrus. If you can get everyone out of this jello before they can, you can be my lover, okay?" 

"WOWIE! DO YOU MEAN IT? REALLY, REALLY MEAN IT?"

"I mean it. And I keep my promises, remember?"

Sans let out a guttural growl, which meant he understood. Gaster let out a more high-pitched sound.

All three skeleton's eyes began to glow their respective colors, and you simply laid back while the jello was beaten and blasted to pieces.

A piece of cake...

but there was more challenges to come.