Will you be my Kitten? (Underfell Sans/Reader)Explicit

Dinner Time

"Hey dollface.. yea got any mustard round here?" Sans tiredly walked to the front of the shop where you were on the computer.

You glanced at him with a raised brow. He had bags under his eye sockets. 'How is that even possible?' He looked like he was ready to pass out. "Sans, are you okay!?" You turned fully to face him.

"M'fine.. just used a lot of my magic to help yall out.." He leaned against the counter, resting his skull in his hand.

"ALRIGHT! LETS DO THIS!!" Undyne called out excitedly. Tj laughed nervously. You could tell he was a bit intimidated by the Fish Monster.

Tj had placed the stencil on Undyne's right forearm. She sat down and leaned back on the cushioned table. "Alright.." Tj was skeptical about the colors showing on her skin..scales..

Undyne watched in excitement as Tj went to work. After a few minutes he pulled away when Undyne broke out into fits of laughter. "THAT TICKLES HUMAN.."

You shake your head, "Your friend is an interesting one.." You tell Sans, but don't get a reply. You turn around to see him passed out where he was leaning. "Aww.." Standing up you walk over and poke him in his ribs.
He twitches but doesn't move. "Sans.." You poke him again.

"Mm..what is it Kitten?" He opens one socket to gaze at you. "Why don't you crash in the break room? Can't really have you sleeping in the front of the store.." "Also there might be mustard in the fridge.."

He shrugs, "whateva you say shortcake.." He shoves his hands in his pockets and walks off towards the break room.

The bells sound and the door opens. A skinny girl with long black hair pops in. "Heeey, I'm here for Lila?" You smile "sure thing,"
"LILAAA.. your persons heree.." You call out to the back.

Lila quickly walks from the back; "Hii, you ready to get this finished?" She smiles sweetly at her gesturing to her station. The girl gives you a smile and walks into the back with Lila.

She stops when she sees Undyne at Tj's station. "Whoa.." She mouths still staring. Lila looks up over at her. "If you are ready.." She urges her to come over and sit to avoid any necessary drama.
She nods her head and goes to get settled in front of her.

You check the clock; it was almost 1:40, and the decal crew hadn't shown up yet. "Geebs.. they were supposed to be here at 1:30 right?"

"Yeah (y/n).. might wanna call em.." He replied back. You groaned grabbing the phone ready to make the call but the bells rang on the door again. You turned around and there stood two people in blue jeans and red matching shirts. They had rolled up vinyl under their arms.

"Oh thank goodness.." You set the phone down.
"Hey guys!" They both wave. "We're here to place the decals on your front window.." "Awesome; go right ahead.." They smile and head back outside and begin their task of cleaning the window and centering it etc.

'At least it's not raining..' You think as you go back to the computer.

After a few more out bursts from Undyne and scaring Lila's client a few times Tj happily finished her tattoo. It was bright and vibrant over her skin. He was about to wipe away the bits of remaining ink and blood when he noticed a strange red glow over take it and watched as it healed.
"Whoa!!" He leaned in closer. Undyne lifted her arm to watch it. "HEH, THAT'S SANS MAGIC FOR YA.."
"What?" Tj looked confused. Sans hearing his name walked out and over to the two of them. Lila's client gasped wide eyed and looked even more nervous now that there were two Monsters idle chit chatting few feet from her.

"My magic has some pretty good healing abilities.. not that I can really heal very well; but ya get what I'm sayin. Her tattoo is completely healed.."