Gaster x Reader- Not Your Fault

Not Your Fault Pt 4

Sans raised an eyebrow in confusion, "What?"

"I said, I want to make a promise to you," You repeated. "I promise that I won't hurt you or your family, not that I have any desire to."

"How am I supposed to believe your promise?" Sans retorted.

"Simple." You explained, "Where I come from whenever you make a pinky promise you can't go back on a promise, and if you do bad things happen."

Sans had a look of distrust but shrugged and sighed, "Alright... But if you do break your promise bad things are going to happen."

You held out your pinky to Sans and he looped his own around yours. "Then it's officially a pinky promise," You told him, smiling.

He paused for a moment, before the corners of his mouth picked up and he smiled at you, "yeah, a pinky promise."

~ ~ ~ ~ ~ ~ ~ ~ ~

Gaster returned with a now less sticky Papyrus to find you and Sans were laughing as they young skeleton pulled puns about how "dishes  the worst chore ever".

You laughed heartily at his puns and the little skeleton was beaming at the reception his jokes were receiving. You noticed Gaster sigh as he entered, "You two are inconceivable. Now, I have important matters to talk about as I must spoon go."

There was a moment of silence as both you and Sans processed what Gaster had just said.

"D-did you just?" You asked.

Gaster closed his eyes and brought a hand up to his face groaning, "Look what you made me do."

You and sans glanced at each other before laughing hysterically while poor Papyrus shuddered in horror.

Regaining his composure Gaster proceeded, "As I was saying, I have to return to the laboratory to work on my experiments. Sans I need you and Papyrus to stay inside today."

A small whine drew your attention to Papyrus, who looked incredibly disappointed. Sans seemed to mirror his brother's displeasure.

"B-but you promised us you would play outside with us today," Papyrus whined.

Gaster sighed, "Please do not whine. It is annoying. I know I promised you, however I am running behind on my experiment."

An idea popped into your head, "I could take them outside. I promise we won't go too far."

Gaster gave you a wary look, "I-"

"That's a good idea. __________ could look after us," Sans agreed.

"It's fine, really. Nothing will happen to the boys, they'll get to go outside and you can work on the core... It's a win/ win situation for everyone," You told him.

Sighing Gaster gave in, "I will permit it."

You smiled and put a reassuring hand on Gaster's arm. He glanced down at you before glancing away and pulling away.

Did his face just turn purple? Mustn't like physical contact.

"Very well, I must be off now," He muttered as he turned away from them and strode towards the elevator.

You turned towards the two boys, "Who's ready for some fun!"

The two children yelled in approval as they raced upstairs to find their jackets.

~ ~ ~ ~ ~ ~ ~ ~

Gaster

Gaster brought a hand up to his sleeve where ________ had touched him. The magic rushing to his face with the memory of the warm touch.