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Til Dust Do Us Part

Chapter 5: in which undyne misunderstands

Summary:

... of epic proportions

Notes:

i cut the chapter in half bc it was getting too long sobBBB

(See the end of the chapter for more notes.)

Chapter Text

They landed in his room.

It would have been suspicious if Sans had just disappeared into thin air out of the house, so he simply teleported to his room, which had a lock. 

“There ya go,” Sans grunted, setting Frisk on top of his bed. She shifted slightly, still not fully awake.

“Wazzgonon?” she mumbled, trying to sit up.

Sans put a hand to her shoulder, cautious and light. “Easy, kiddo. Ya gotta lie back down.”

“Huh? B… but why?”

He immediately straightened and went to the bedroom door, pulled out his bedroom key, and turned the lock.

“Sans, what are you doing?” Frisk asked again, a sound of faint alarm in her voice. Alarm, and fear

Sans turned, taking in her expression. He looked back at the door, and back at Frisk. Saw how frozen her body was.

“Undyne is here,” he whispered, and her frozen expression melted away into one of relieved understanding. “’M sorry, kid. Didn’t mean to frighten ya.”

“S’okay.” Her fear dispelled, Frisk returned to looking immensely tired. “Wait, Undyne is what? ” Her opened her eyes wide, and attempted to get up. “I should leave-”

“Nah, don’t move. Get some rest. You’ve, uh… had kinda a long day. I got this. She’s lookin’ for me, so uh, ’m gonna head downstairs and then she’ll leave. I know locked rooms bother ya, so-” Sans tossed her the key; it landed next ot her on the bed. “There ya go. If it gets too much, you can leave. Just try to ’n keep quiet for me, yeah? I don’t want Undyne to find out about ya, as well.”

“I’m sorry for making you do this,” she said softly. “All this just for me.”

Sans paused, about to teleport, and glanced at her again. “Kid,” he said sincerely. “I wouldn’t be doin’ this fer ya if I didn’t think you were worth the trouble.” 

Frisk blinked rapidly on the bed, suddenly looking very small.

“I really gotta go, though. I’ll be back in a jiff.” Sans gave a little salute and evaporated, reappearing in the downstairs bathroom.

Pretending that he had just needed to pee, he flushed the toilet and casually strolled out, hands in his pockets. 

“Oh, there he is!” Papyrus said. “Sans! Undyne wanted to see you!”

“Did she?” Sans turned. 

Undyne had clearly just come off from work; she was still in her dark police uniform, her red hair tied up in a ponytail. She jabbed a blue finger towards Sans, and demanded promptly, “What’s your deal with Alfred?”

“Well, hello to ya, too, Undie.” Sans shuffled into the kitchen, calling out, “D’ya want some coffee?”

“WHAT? NO! I CAME HERE TO GET AN ANSWER FROM YOU! NOT TO DRINK COFFEE !” A pause. “GIVE ME A DOUBLE EXPRESSO, IF YOU CAN!”

“Yer the boss.” Sans started up the coffee machine. 

“Who’s Alfred?’ Papyrus wondered out loud.

“HAH! Just some punk from my department. And apparently, Sans is interested in him! Even has a weird photo of him! And I just want to know why!”

“Ya could’ve texted me,” Sans pointed out.

“CONFRONTATIONS AND INTERROGATIONS SHOULD HAPPEN FACE-TO-FACE, NOT THROUGH A SCREEN AND TEXT! THAT’S FOR WIMPS AND LOSERS!” Sans came back with her cup of coffee. “THANKS!”

“Perhaps Sans is trying to make friends!” Papyrus theorized. 

“’S nothing like that, Undie.” Sans leaned against the wall. “Just, uh. Got curious.”

“Why’s that?” Undyne barked. 

Sans thought fast. “Just wanted to know who yer co-workers are. He came by the store a while back.”

“Really?”

“Yeah. He seemed like a, uh, interesting dude.” Sans remembered next to nothing about his encounter with Alfred, but Undyne had described him as disagreeable. He could play off of that. “’N he was a police officer, so I wondered if ya knew him. That’s all.”

“Interesting is a lame adjective,” Undyne growled, chugging the entire cup of coffee in one go. “Then again, Alfred is a lame human. So I guess it’s fitting!”

Sans phone suddenly sounded; he pulled it out to find a text from Frisk.

 

kid

i can hear undyne screeching from here LMAO

Can you get her to leave? I gotta pee

hold it in for a lil while longer

Im going to piss all over your bed and its going to be all your fault

pls refrain

that mattress is already dirty enuff

Then hurry :)

 

“Who is that you’re texting?” Undyne inquired, peering at his phone. Her eyes squinted. Sans turned off his phone, but it was too late.“Who is kid ? Are you talking to Monster Kid?”

“Is that whom they are called?” Papyrus said, gasping. “Sans has been texting someone nonstop for the past few days! When I was still at Toriel’s, he would constantly be checking his phone. SANS!! WHY DIDN’T YOU TELL ME YOU MADE A NEW FRIEND?”

Well. This was an undesirable situation. Sans gave a slight shake of his head to Papyrus, hoping he would connect the dots.

And miraculously. Papyrus did . His eyes bulged. “OH!”

Sans gave a small sigh of relief.

“OHHH! I know who it is!” Papyrus bounced on his toes, unreasonably thrilled to have figured it out.

“Who?” Undyne demanded. “ Who ?”

“NYEHEHEHEHEH! THE GREAT PAPYRUS HAS BEEN INFORMED IN CONFIDENCE ,” Papyrus said smugly. “YOU WILL HEAR NOT A WORD ABOUT SANS’ HUMAN FROM ME.” 

“So it’s a human!” Undyne said triumphantly.

“WH- WHAT? I NEVER SAID THAT!”

“You just did!” Undyne appeared to be thinking hard. “So Sans has a human friend… who’s contact name is kid … Hey… could it be-?”

A noise came from Sans’ bedroom. A pained kind of noise.

“Kid,” Sans said, and immediately started up the stairs.

“WHAT IS HAPPENING TO THE HUMAN?” Papyrus cried, running after Sans.

“WHAT’S HAPPENING IN GENERAL ?” Undyne yelled, following them both with an irritated, confused expression. 

Sans didn’t answer him, going up to the bedroom and immediately knocking on the door. “Kid? Kid, talk to me. What’s going on?”

There was a muffled groan, and then a heavy thump ; it sounded like Frisk had fallen out of bed. 

“Kid, unlock the door,” Sans instructed. His eye stuttered blue. 

“I can’t move,” came Frisk’s whispered reply, scratchy and aching. “It h-hurts when I move.”

Sans closed his eyes, trying to think of what to do. Frisk had the key to open the door; he could ask Papyrus to tear the door down with his bones, but what if he accidentally ended up hurting her instead? His aim wasn’t exactly precise. There was a window from his room, but it was a story up, too high for him to reach normally.

If he could just get Papyrus to leave, he would be able to teleport inside and get her out, but… 

“STAND BACK!” Undyne came thundering up the stairs. “I WILL ASSIST!”

She grabbed the door handle and yanked the door completely off. 

Well. That workedd as well.

Papyrus came rushing into the room. “HUMAN!!”

Frisk was huddled on the floor, arms wrapped around her waist. Sweat was rolling down her face, and she was shivering so much the floor was practically vibrating with her.

“SANS!! WHAT DO WE DO?!” Papyrus shrieked, looking panicked as he towered above Frisk, wringing his hands.

“Hey, Undyne,” Sans said, walking to where Frisk laid, “didya take yer car to get here?”

Undyne, who had been standing at the entranceway frozen, her eyes on Frisk, snapped to attention. “Yes, I did.”

“Great.” Sans encircled his arms around Frisk, lifting her up, one arm underneath her knees and the other to her back, her head resting on his collarbone. “Let’s go, then.”

Undyne’s car was parked by the curb of Sans and Papyrus’ house. It was a bright, neon green Jeep, the license plate reading UNDYNE2 (“I’m Undyne #1, and my car’s Undyne #2! Clever, right?! FUFUFUFU!”).  

“Drive to the nearest hospital,” Sans ordered as soon as they were all buckled in. “Quickly.”

“DON’T TELL ME WHAT TO DO!!” Undyne growled, but started the car and began roaring down the street at a very illegal speed.

“AREN’T YOU A HUMAN POLICE OFFICER, UNDYNE?” Papyrus shouted.

“YEAH! I AM!”

“YOU ARE IN CHARGE OF UPHOLDING THE LAW?”

Undyne straightened. “YES!”

“THEN WHY ARE YOU DRIVING 20 MILES ABOVE THE SPEED LIMIT???”

“BECAUSE I’M A HUMAN POLICE OFFICER!” Undyne skidded on a right turn, nearly ramming into another on-coming car. “I CAN DO WHATEVER I WANT!”

“That’s probably not how it works,” Sans said. How she even managed to obtain her badge, that was beyond Sans.

“REALLY?? THAT SEEMS TO BE THE SENTIMENT OF ALL COPS! FUFUFU!!” 

Frisk leaned over Sans’ body to puke out the window.

After a few more minutes of reckless driving and near collisions, they arrived at the Louie St. Clair Hospital. 

“HEY!! YOU!!” Undyne shouted, busting open the hospital doors. The clerk in the front and the quiet people in the waiting room all jolted. “SHE’S DYING! HELP HER!”

“THE HUMAN IS DYING?!” Papyrus sounded out of his mind with panic and worry.

“Paps, don’t worry. The human doctors won’t let that happen.” Speaking of, about 3 of them came hurrying out of the doors, one of them pushing a stretcher and an IV drip bag. That was fast. Sans began unloading Frisk onto the cot. She grabbed his jacket sleeve weakly.

“Yer okay, kiddo,” Sans said, so quietly only Frisk could her. He put a careful hand on top of hers, and pulled her free. Then her eyes closed.

“What happened, sir?” one of the doctors asked.

“Well, uh- she was hanging out with me ’n Paps at our place, and then she, uh, went upstairs to one of the rooms for a bit. Long story, she wanted to avoid bumpin’ into Undyne.” Sans scratched the back of his neck, watching her be wheeled away. “Next thing I know, I hear cries comin’ from the room. S’we brought her here, and…” 

“What are her symptoms?”

“Well…” Sans thought for a moment. “She got kinda sleepy, ’n she said she had to use the bathroom real bad before. She was shiverin’ the entire way here. Sweating too… she threw up in the car as well. And it looked like her stomach was in pain.” 

“You mentioned her being sleepy? How long was she exhausted for?”

“Uhh. Since maybe 7?”

“Alright. Thank you, sir. Please wait out here. If you could fill out the paperwork for her, that would be great; Miss Trii up there will help you.” The clerk gave him a reassuring smile from her desk.

“Sure.” 

After recieving a clipboard, papers, and pen, Sans began filling out everything. After a few minutes of scribbling, he handed back the forms to the clerk.

“Thank you…”

“Sans.” He shoved his hands in his pocket. “Sans the skeleton.”

“Thank you, Sans. I assure you that-” Miss Trii rifled through the papers, a fine eyebrow raising, “- Ambassador Frisk is in good hands.” 

“’Preciate it, thanks,” Sans replied, then walked back to Undyne and Papyrus, who were doing a very bad job of waiting quietly in the waiting room. Undyne was pacing. Papyrus didn’t know what to do- he kept sitting and standing and walking around only to return to sitting, and the whole cycle began again. 

“What’s going on with Frisk?” Papyrus asked immediately.

Sans sat down next to Papyrus. “I have no clue. Looks like we’re gonna be here fer awhile.” 

“What do you think happened to her?” Papyrus asked, fearful.

It was at this point the situation was really dawning on Sans. It was evidently clear that Frisk had been poisoned somehow, if her symptoms were anything to go by. His mind was turning; there were plenty of people who would want to poison the Ambassador, but she had been out of commission for nearly half a decade; who would hold such a grudge?

His stomach seemed to sink. It couldn’t have been someone from the Xienthyst Church, right? Or maybe it was Kaycee M. herself. How had they found out so easily? How had they targeted Frisk?

Carrying Frisk’s body reminded him too much of Papyrus. Nausea rose. If he had skin, it would have been crawling. Kaycee M. had struck again, and once more Sans was useless. 

Not that he was going to say any of that to Papyrus. So Sans dodged the question. “Whatever happened, the doctors’ll fix her right back up. Don’t worry, Paps.”

“This is unbelievable,” Undyne muttered, still pacing.

“I know! How could this have happened?” Papyrus mused. “The human appeared to have been in great health.” 

“No,” Undyne gritted out, and stopped in front of Sans and Papyrus. “I was talking about the fact that she’s back .” 

Papyrus’ mouth opened and closed like a fish, then he looked at Sans helplessly.

“I mean, SERIOUSLY!” Undyne spat out aggressively. “ FIVE. YEARS. Five years of NOTHING!! And then THIS?” 

So today was a day for hard conversations. “Undyne, look-”

“She screwed all of us over!! How are you not more mad?!” Undyne paused, then jabbed a finger at them both accusingly. “ Unless you were in on it the entire time ?”

“Wha- no, Undyne, that’s impossible,” Sans replied, exasperated.

“HOW CAN I BE SO SURE? YOU HAD HER PHONE NUMBER SAVED!”

“I found out she was back by pure accident a few days ago,” Sans explained, sitting up a little. “’N  Paps just found out, like, just a couple hours ago. We had no idea, just like you.”

“THEN YOU SHOULD UNDERSTAND HOW INFURIATING THIS ENTIRE SITUATION IS!!” Undyne yelled. People were beginning to shoot them disgruntled looks.

“Undie, I get yer mad.” Sans raised both hands to placate her, eyes darting around. “But just, uh- just tone it down a bit, yeah? This is a hospital.”

“Hmfph,” Undyne grumped, sitting down on a chair with such force that it shattered into pieces beneath her.

“She’s got guts, I’ll give her that,” she continued, sitting on a new chair, fuming. “Coming back after she abandoned us all like that. What right does she have!” 

“I mean,” Papyrus said timidly, “She probably has every right. At a legal standpoint. As a cop, you should know the laws.”

“Hmfph,” Undyne grumped again. 

“Undyne, I don’t get why you’re so upset! The human is back ! She did not abandon us after all!! Don’t you want to give her a hug after not seeing her for so long?”

“No,” she growled. “As soon as she’s discharged, I’m gonna punch her in the face!”

“B- But then… she’d have to go back to the hospital.”

“GOOD!! I HOPE SHE STAYS THERE FOREVER SO I NEVER HAVE TO SEE HER AGAIN!” Undyne slammed a fist into the arm of the chair, causing it to break. “Abandoning your friends is what losers do! Frisk is a loser! I don’t want anything to do with her!”

“But you agreed to take her to the hospital,” Sans pointed out.

Undyne grumbled again. 

“Did you two hit your heads on the way here? Did you forget what happened after she left? She hurt everybody. Queen Toriel couldn’t get out of bed! King Asgore was even more of a buffoon than he usually is! And Alphys…” Undyne’s face contorted. “After everything we went through together- the Underground, the struggle to be accepted on the Surface- right when we needed her the most, she vanishes. Why did she even go, anyway? Huh? Did she get bored of us, or something?”

“I don’t think so,” Sans said.

“How’re you so sure?”

He shrugged. “C’mon, Undie. Maybe you hit yer head on the way here. That’s just not her nature, y’know? That kid… she’s stubborn ’n headstrong and can’t take ‘no’ for an answer. ’S what made her a good ambassador, ’n it’s what also made her a good friend. If she left, there’s probably a good reason.” 

“A vague ‘good reason’ doesn’t fix everything,” Undyne replied tersely. “A good friend wouldn’t have fractured a community she supposedly worked so hard to build.” 

“Maybe you should ask her ’bout it, then. When she wakes up.”

“Hmph. Maybe I will!”


“Hey, Sans.”

Sans cracked open an eye to glance at Undyne. They had been waiting in the hospital for about 30 minutes now (Undyne had paid for the chairs she broke, don’t worry). It was 9:21. Papyrus looked very tired, but was vigilantely staying awake. Sans was impressed. 

Undyne, on the other hand, was wide awake.

“Yeah?”

Undyne’s tone was suspicious. “What was Frisk doing over at your house, anyways?”

“Oooh, we were watching a movie together!” Papyrus piped in excitedly. “So, earlier, after I found her in Sans’ room-”

“You found her WHERE ?” Undyne bellowed, just as Sans said, “Aw, jeez, Paps, ya can’t say it like that.” 

“What? Why not?” Papyrus looked genuinely confused. “It’s what happened! She was touching your rock!”

Undyne stood up so fast what remained of the chair flipped backward. “ SHE WAS TOUCHING SANS’ ROCK?”

There weren’t that many people in the waiting room now, but what few lingered gaped at them. 

“He mean my actual pet rock,” Sans hastened to clarify. “Undie, please sit down.”

“AND IN FRONT OF PAPYRUS TOO???” Undyne was looking very, very angry and very, very nauseous. “MAYBE THAT’S WHY FRISK IS ILL. INTERCOURSE BETWEEN MONSTERS AND HUMANS IS-”

Ahem .”

The doctor from earlier stood behind them, coughing awkwardly into his fist.

“SIR!!” shouted Undyne, standing to attention. Papyrus and Sans rose. 

“Whats the news with the kid?” Sans asked. 

“Well, she’s in stable condition,” the doctor began, and the three of them breathed a sigh of relief. “And at the moment, she’s ready to be discharged.”

“Really?? So quickly?!” Papyrus hugged the doctor. “Thank you, human, thank you!!! Your healing powers rival even Queen Toriel’s!!”

The doctor, though looking bemused, patted Papyrus on the back. “It’s no problem. Just doing my job.” Turning to look back at Undyne and Sans, he continued more seriously, “It appears to have been a bad case of food poisoning.” 

Sans blinked. “Food poisoning,” he repeated. “As in… poison was injected into food she ate?”

“No! No, goodness no.” The doctor shook his head. “Nothing serious as that, fortunately. No, I am speaking of foodborne illness . Something she ate was contaiminated with salmonella. Now, symptoms for salmonella typically appear after 6 or more hours after infection, but from what Miss Frisk has told us, she began showing symptoms two hours after dinner. It seems more likely then that she contracted it from dinner.” 

“From the burgers ?” Sans echoed, incredulous. He didn’t know why he was surprised. Of course it was from the burgers.

“Did Papyrus help make ’em?” Undyne asked.

“Well-”

Undyne snorted. “Of course he did.” 

“The bacteria has entered her bloodstream, however,” the doctor continued, folding his arms. “which while very serious, is nothing that can’t be dealt with. You brought her in quite early, so it wasn’t too late. We’ve prescribed her an antibiotic to take for about two weeks- fluoroquinolones. She’ll have further instructions on how to acquire them, but I thought it would be prudent to inform you.”

“Thank you very much, sir,” Sans said, and shook the doctors hand. 

“Of course. She’ll be out in a minute. Good night to you all.”

The doctor nodded to them and left. Sure enough, a few moments later Frisk emerged, looking tired but no longer in pain. Sans let out a quiet breath he hadn’t realized he’d been holding, and a wave of relief washed over him. So it wasn’t Kaycee M., after all. Frisk was still okay.

“HUMAN!!” Papyrus bounded up to Frisk, nearly toppling her over. 

“Hey, Papyrus,” Frisk said, smiling softly and hugging him. “Good to see you.”

Frisk’s eyes drifted upward to Undyne; her expression fell, and she slowly unwound herself from Papyrus. “... hey, Undyne.” 

“Hey,” Undyne said back bluntly. “It’s, uh- it’s good to see you’re doing better.”

“Oh, uhm… yeah.” Frisks’ voice was hesitant. Her eyes found Sans, who merely shrugged, as if to say, this is your battle, kid

“And it’s good to see you. In general. After 5-odd years,” Undyne added. 

“Right,” Frisk said, her gaze falling to the floor. Sans could see her throat bob as she swallowed. “About that-”

Undyne waved her off. “Don’t even bother. You’re not off the hook, but even I’M not heartless enough to interrogate someone right after they’ve been discharged from the freakin’ hospital! Salmonella, eh?”

Frisk’s lip twitched. “Uh, yeah, apparently so. It was probably either the cheese or the meat.” 

“Human, I am so sorry!!” Papyrus apologized, looking crestfallen. “I berated you and Sans about making the burgers, but it was ultimately my screw-up.”

“Papyrus, it’s okay,” Frisk assured. “I’m okay now, aren’t I? It wasn’t your fault. It was probably Sans’ fault.”

“Hey,” Sans interjected. 

“I mean, you know Sans,” Frisk continued, playfully elbowing Papyrus, who giggled. “He’s a lazybones at heart.” 

Even just out of the hospital, Frisk was looking out for others; Sans was reminded of all the other times she cheered up Papyrus despite herself. Undyne was definitely wrong, Sans thought, watching his brother as Frisk laugh at his expense. Frisk was a good friend .

“Alright, ya punks. IT’S GETTING LATE!!” Undyne grabbed Papyrus by the waist and carried him using one arm. “LET’S GO FOR A RIDE IN #2!!”

“SAAAAAAANS!!!” Papyrus shrieked as Undyne bounded out of the hospital door. 

Sans laughed, watching them disappear. “I don’t know where she gets the energy, to be honest.”

“’Course you don’t.” Frisk poked him on the side. “I meant what I said. You’re a lazybones at heart.”

“Well, ’scuse you.” Sans poked her back. “Ya should be thanking this lazybones for saving yer life.”

“You’re right, you’re right.” Frisk’s smile faded. “Thank you, Sans.”

“Psh. I was just jokin’, kid. ’S nothing, really.” Sans kicked at a random rock on the sidewalk. “I should be apologizing to you, actually.”

Frisk tilted her head. “What do you mean?”

Sans gestured towards Undyne’s figure in the distance. “Well, Undie found out. That’s not too good.” 

“You did your best with the situation you were given. I don’t blame you at all.” Frisk sighed, her breath fogging up in the cold night air. “But… I definitely won’t lie. It’s not ideal.”

“Not ideal?” Sans echoed.

“Yeah.” Self-consciously, Frisk tucked a hair behind her ear. “Originally, no one was supposed to know I came back, y’know? I was just going to take care of this little thing then leave for good. Having people know just… complicates things.” 

Sans paused, looking back at her seriously.

“How come?”

Frisk laughed a little at that, lowering her gaze. “It’s better if you don’t know, Sans.” 

“’N why’s that?” 

She smiled, melancholic and slow. “Because it would complicate things.” 

He watched her go, studying her for a moment before following. 

“THERE YOU ARE, YA SLOW PUNKS!!” Undyne had been waiting impatiently in her car. “I’ve seen human GRANDMAS walk faster than you! FRISK!!”

Frisk had been buckling herself in; at the sound of her name, she jumped a little. “Hm?”

“GIVE ME YOUR ADDRESS! I’LL DRIVE YOU HOME!”

“Yeah, of course. It’s 712 Sanderson Avenue. Thank you.”

It was a quiet 10 minute drive from the hospital. By the time they had arrived, Frisk had fallen asleep again.

“Sans, you got her?” Undyne asked, stepping out of the car.

“I got her,” Sans sighed. It seemed he was permanently stuck on Carrying Frisk duty. 

When they approached the front door, they realized they had a problem.

“We don’t have keys,” Papyrus noted.

“KEYS ARE FOR LOSERS!”

Shhh ,” hissed Sans and Papyrus as Frisk gave a gentle snore.

“ᵏᵉʸˢ ᵃʳᵉ ᶠᵒʳ ˡᵒˢᵉʳˢ !” Undyne whisper-shouted, then yanked the door clear off its hinges.

“What’s the point of being quiet if yer gonna do that?” Sans rolled his eyes, but luckily, it didn’t wake up Frisk. “Aight, let’s get her to her room ’n then we’re outta here.” 

They stopped merely a few feet in.

To say Frisk’s house was a wreck would be an understatement. Even without any light on, Sans could make out empty take out cartons littering the floor, along with empty glass bottles, some of them shattered. Paper towels were scattered everywhere .

“What the hell ?” Undyne said.

“The human is quite messy,” Papyrus noted, looking a little daunted by disarray. 

“That’s one way to put it,” Sans muttered, adjusting his grip on Frisk. “... Keep going, you guys. Don’t gawk.” 

They continued down the one hallway, which lead to a bathroom on the left and Frisk’s bedroom straight ahead. Papyrus needed to use the restroom, and so he went. Undyne- carefully, this time- opened the door.

There were pencils and papers strewn all over the floor, covering every inch of wood. The desk pushed to the right side was drowning in notes.

Sans approached the bed, then noticed a stack of newspapers sitting on the stand next to it. Unlike the rest of the room, which was haphazard and messy, these newspaper were crisp and folded neatly. Holding Frisk with just one arm, he reached down and flipped through the papers. 

They were articles about Toriel and Asgore, updates on the city in which they all lived in., advertisement posters for Grillby’s, that sort of thing. The edges were bent and creased; clearly they had been read quite a few times. In between the sheets, there were photos- Sans ran a gentle finger over a Christmas photo, taken at Toriel’s house. Sans, Papyrus, Undyne, Alphys, Toriel, even Asgore was there- and Frisk.

 Across the door, a bulletin board hung- photos and notes and red string was tacked all across, words like connection and suspect all over the board.

This didn’t go unnoticed by Undyne, who studied the board with shrewd eyes. “Hey, Sans. Look at this.”

Sans didn’t need to look. “I know, Undie.”

She glanced at him sharply. “You know?”

There was no point keeping the secret now. “Yeah. Remember how I said I found Frisk out by pure accident? Well…”

He relayed the entire story to her. Undyne listened with uncharacteristic silence. 

When he finished, she yanked the entire bulletin board off the wall.

“What are you doing.”

“I’m taking this with me,” Undyne puffed. Around the wood, she gave Sans a grave look. “She can’t stay here, Sans. This place’ll suffocate her to death.”

Sans glanced around, realizing Undyne was right. “... Okay. Let’s go back to my place.”

They left the bedroom. Papyrus was washing his hands using the sink; he bounded out when he saw them leave. “Are we ready to go?” Papyrus asked. His eyes went to Frisk. “Why is the human not in bed?”

“She’s not stayin’ here,” Sans explained. “She’s gonna have a sleepover with us.”

“A sleepover ?” Papyrus gasped. “YIPPEE!! I’m so excited!” 

He ran out the door. Undyne followed. Sans was about to join them, then paused.

The bathroom light was still on; he could see, across the sink  and shower, was a cabinet full of medication bottles. Inexplicably, he drew closer, and opened it; scanned the rows of aspirins and cough syrups, and saw two stand-alone, white bottles, very clearly prescribed. Lexapro , the label read. They had never been opened.

Sans looked down at Frisk’s peaceful, sleeping face.

“SANS!” Papyrus shouted from outside.

“Coming,” Sans called back, his eyes never leaving Frisk’s face. Without missing a beat, he grabbed the bottles and pocketed them, before hurrying outside to Undyne’s car.

Notes:

<3