Funny Bones: A Fluffy Undertale Fanfic

Tickle Teasing

Frisk didn't want Sans to escape while she went and told Papyrus of how she pranked him, so she flopped down on their couch and made it like nothing happened. Sans watched her for a moment before sitting beside, in his regular lazy-bones position. After what seemed like ages, Papyrus came out from the kitchen, and greeted them;
"LAZY BONES! OF COURSE YOU'RE DOING ABSOLUTELY NOTHING. OH, HELLO THERE, FRISK!"
"Hey there Papyrus, what have you been doing?"
"MAKING SPAGHETTI, OF COURSE! WHAT ELSE WOULD I, MASTER CHEF PAPYRUS, BE DOING?"
Frisk giggled, she had a brilliant answer to this question, however she couldn't say it while Sans was keeping them company.

After a bit of chatting, Papyrus stood up,
"IT'S ABOUT TIME FOR DINNER, WHO WANTS SPAGHETTI!"
"Eh, I mean, that's all the way in the kitchen. That's too far for me to reach Papyrus." Sans replied.
"I'll get it for you Sans!" Frisk chirped
"FRISK, YOU SHOULDN'T ENCOURAGE HIS LAZINESS-" Papyrus started, but Frisk was already making her way to the kitchen and didn't seem to be affected by Papyrus's words. Once Papyrus and Frisk were alone, she made her move. Gently, ahe pulled at his scarf the get his attention and motioned for him to be quiet.
"I didn't want to say this in front of Sans, but today, I found out something about him!" she whispered excitedly.
"WHAT WAS IT?" Papyrus asked.
"Sans is ticklish!"

"OH! NYEH HEH HEH, THAT'S FUNNY, NOW WE CAN REALLY TICKLE HIS -"
"I've already used that pun, let's not overuse it."
"OK. WELL WHAT ARE WE WAITING FOR? LET'S USE THIS KNOWLEDGE TO OUR ADVANTAGE!"
With that, Papyrus leaped out of the kitchen with grace never seen in this world before. Frisk paused, and smiled to herself when she heard the same squeal arise as before, only this time it was accompanied by some protests and Nyeh heh hehs.

She went back to the living room, where Sans was wriggling on the floor laughing uncontrollably while trying to both escape and push Papyrus away. Papyrus crouched beside him, one arm wrapped around Sans arms to prevent escape and other tickling wildly. Sans looked up at Frisk with difficultly, pointed a finger and between gasps said,
"I w-will... Ha-h-ave- revenge!" before giving up to his brother's tickley attacks.

After pulling Papyrus off of Sans, telling Papyrus off, giving Sans multiple hugs as an apology,and then giving Papyrus hugs so he wouldn't be left out, Frisk left, knowing Toriel would worry if she stayed too long. However, she couldn't get Sans's promise of revenge out of her head. Maybe she shouldn't of told Papyrus so directly, maybe she should have given hints and let Papyrus find out for himself. Then again, Sans would know it was her who led him on. And anyway, what's the worst that could happen? It's just a little messing about, nothing too harmful.
Right?