Frisk sat bundled up on the couch after dinner. Sans had gotten almost all of the blankets in the house and made her a little nest. The two sat on the couch watching tv together. Since Frisk slept most of the day she was wide awake when it was bedtime. Sans agreed to let her stay up a little bit longer, despite how much he wanted her to get some rest.

"Hey Dad, can we watch a movie or something?"

"what do you want to watch kiddo?"

"I don't know, I always pick out the movie. Why don't you pick this time?"

"well why don't we watch something we've already seen before, so you don't get too invested and you might actually fall asleep."

"I've slept so much today though."

"but resting is the only way you're going to get better."

"Yeah, I know." Frisk sighed. The two sat in silence for a while, just staring at the tv, watching some show neither of them really cared about. "Don't you have work tomorrow, shouldn't you go to bed?"

"nah, i called out. told them you were sick and that i was gonna be taking care of you."

"Dad it's just a sore throat and a cold. Humans get sick like this all the time."

"yeah, when i was reading up on this stuff it said that this kind of thing was common for humans. but you're getting worse, not better. your fever is rising every time we take it." Sans explained to her and pushed her hair back.

"That's actually normal for humans. Sometimes we get worse before we get better."

"speaking of your sore throat, didn't it hurt to talk?"

"Yeah, but these cough drops help a lot. So it doesn't really hurt too bad."

"why are they even called cough drops if they help a sore throat?"

"I don't know."

"wait…" Sans stopped, he sat forward and looked as if he was in thought for a moment. "If you have a sore throat why are you coughing?" Did he diagnose her wrong? Well he isn't a doctor, and the medicine he gave her should still help.

"Well, it's not so much of me coughing as it is I feel something in my throat and i'm trying to get it up."

"i think they called that phlegm in the book."

"Yeah, that's it!"

"alright so if you have phlegm in your throat then i need to get you something to break that up. i already set up a doctor's appointment for you tomorrow."

"Ok." Frisk nodded. She laid her head down on Sans' lap and he ran his bony fingers through her hair. Eventually Frisk began to fall asleep, despite how hard she tried to stay awake. Sans chuckled at her everytime she jolted and flung her eyes open again. He finally picked her up to carry her to bed, Frisk tried to protest but gave up halfway through her first word. He tucked her into bed and gave her a kiss on the forehead, telling her to get a good night's rest.

He walked back downstairs and picked up the medical book. It made sense that she would get worse before she gets better, but that doesn't mean he was any less worried. Whether this was a common thing or not in humans Sans didn't really care. His daughter was sick. This is the first time she's sick. The only other time any monsters had seen a sick human child was the first child who fell into the underground, and everyone knew how that whole thing ended. Sans isn't about to let the same thing happen to Frisk. Knowing that this sickness was a common thing helped, but also knowing the only sort of interaction any monster ever had with a sick human ended with the human dying wasn't the best thing for the skeleton to be thinking about. He knows that he might be worrying a bit too much over something that's supposedly common but he can't help but fear the worst. After a bit of reading Sans finally decided he should go to bed.

The next morning Sans woke up to his phone again. He looked at the caller ID and saw Toriel.

"hey."

"Hello Sans. Im sorry im calling so early, but I was wondering how Frisk was doing."

"well, she's still asleep. her fever kept going up last night but she told me that's normal when humans first get sick."

"Well did you take her to the doctor yet?" Tori practically yelled into the phone.

"i made the appointment, they were all booked up for yesterday so we're going later today."

"Alright well keep me posted, please."

"sure thing tori." The two then hung up. Sans looked at the clock and for as much as he wanted to go back to sleep he also wanted to take Frisks temperature and make her something to eat. He sighed while getting out of bed and went into the kitchen.

Frisk woke up to the smell of chicken noodle soup. She opened her eyes to see there was a cookie tray on her nightstand. On it was the soup she smelled, some toast, juice, and a note.

hey frisk, its dad. im gonna be out for awhile. i have to pick up a few things and here so if you need anything he can get it for you. be back soon.

Frisk smiled at the note, he probably went out to get something to break up her phlegm. She sat up and brought the tray to her lap. Before taking the first spoonful she grabbed the remote and put on another movie.

Sans returned with some lemonade that was suppose to be good for breaking up phlegm. Sans poured her a glass then told her to get ready to go to the doctors.

The doctors visit was fairly short. He basically said that Sans was doing everything right and told them to take some medicine that they already had. If nothing else the visit to the doctor helped ease Sans nerves that everything would be ok.

It was nearly 6 o'clock when the doorbell rang. Gaster opened the door and smiled at the yellow monster that was there.

"Hello child, how may I help you?"

"Im here to see Frisk. I have her homework." The little armless monster smiled. Gaster let Monster Kid in and told him where Frisk's room was.

Frisk's face lit up when she saw Monster Kid in her doorway. She immediately thanked him for coming and for bringing her school work. MK came and sat down with her to watch the rest of a movie. No one was really bothered by the fact that MK was hanging out with Frisk while she was sick. Monsters couldn't catch human diseases.

"alright kid, time for another dose of medicine." Sans announced walking in with a little cup of purple liquid and some juice. Frisks face quickly turned to one of disgust. "i know kiddo but you gotta take it." Frisk sighed and took the two items. MK looked at her curious as to why she made the face she did. Frisk stared into the small cup of purple for a few moments before turning it upside down and into her mouth. Her face scrunched up and MK laughed at her silly face. She took a sip of the juice as quickly as she could. "good job kiddo. i think maybe monster kid should start heading home. i gave you the night time medicine so hopefully you'll get to sleep soon."

"Alright, i'll see you soon Frisk. Feel better." MK said and left.

"Dad, I have a question?"

"what's up?"

"Where's mom and Asriel?"

"the king and queen had to take care of some stuff out of town for a few days, something about official business. sorry squirt. do you want to call them?"

"No i'll just text them. It puts less strain on my voice that way."

"good idea. dinner should be ready in a few and after dinners over i'll run some water for you to take a bath. by the time your done the meds should start to kick in."

After dinner Frisk started texting Toriel. Sans walked into the room and saw the little girl smiling at her phone. "hey frisk. mind if i take your temperature again before you go into the bath?" Frisk sat up and took the thermometer from Sans. When it went off Frisks temperature had gone down a little bit, not much but a little. Sans still smiled knowing that she was a little better. He ruffled her hair and lead her to the bathroom.

When she came out she saw her toys were put away and her bed was made with fresh sheets. Sans came in and read her a bedtime story, she fell asleep before it was even over.

The days went by and Frisk started to feel much better. Her temperature kept going down and she had seen nearly every movie in the house. Sans was finally able to sleep much better, as the thought if the first child left his mind. Torial came over before stopping home from her trip, Asgore and Asriel were with her. They all promised to bake Frisk a cinnamon butterscotch pie once she was totally better.

MK or Leah stopped by after school while she was sick to drop off school work. Sans had Frisk better and able to go back to school by Monday.

As he put her on the bus that morning he thought of the first child one more time. Frisk waved goodbye to him and the last thoughts of anything like that ever happening to Frisk left his mind.

A/N: Thank you again to Tat for requesting this! If anyone has anything they'd like to see just let me know!