The monsters sat in the living room. All except for Sans and Undyne, who were sitting in time out again.
"Mettaton, can we pwease come out of time out?" Undyne asked.
"Have you learned your lesson about fighting?" Mettaton asked. Undyne nodded. "Good, then you can come out."
"Sweet! Now we can continue our fight!" Sans said, summoning Gaster Blasters.
"Yes!" Undyne said, holing up a spear. Mettaton picked both of them up they the collar.
"Do you want to sit in time out again? For twice as long?" He asked. Undyne and Sans shook their heads.
"Fine," Sans said, pouting.
"M-Mettaton," Alphys said, nervously.
"What is it, darling?' Mettaton asked, kneeling down to her.
"I'm worried a-about t-them," Alphys said.
"And why is that, darling?"
"T-They're acting like k-kids. Papyrus already had an a-accident, and Undyne,"-
"Hahaha! You peed your pants!" Sans shouted, pointing at Undyne.
"S-Sut up Sans!" Undyne shouted at him, tears in her eyes. Mettaton sighed and walked to Undyne.
"Well, this is a pretty big problem you've found yourselves in, darlings," He said. Sans was too busy laughing to pay attention. "Undyne, darling, why don't you go and change. And Sans, do not laugh at her," Mettaton said, turning to Sans.
"Alright, alright, sorry. Don't get your metal panties in a bunch, Metroid," Sans said, hopping onto the couch. Mettaton rolled his eyes. He was about to walk to the kitchen when he felt something tap his leg.
"U-Um, Mr. Mettaton?" Toriel said, quietly.
"Oh, what do you need darling?" Mettaton asked, kneeling down to her.
"I hate t-to sound c-childish, but I'm a bit hungry," she said.
"Oh, um, alright. Is there anything around here that I could make?" Mettaton asked.
"Well, there's some butterscotch pie that I made yesterday, or there's some spaghetti that you can cook," Toriel said, thinking.
"Spaghetti!" Papyrus shouted. I wanna hewp cook!
"Oh, alright Papyrus," Mettaton said, following Papyrus into the kitchen. It was then that Frisk started crying. "Toriel, darling, could you get Frisk please?"
"I will," Toriel said, running to Frisk's room.
"So, Papyrus, how do we start?" Mettaton asked, looking at the skeleton.
"You have to get a pot and boiw watew," Papyrus said, reaching to grab a pot.
"Hey Metroid, we kinda have a problem," Sans said, walking into the kitchen.
"What's that, Sans?" Mettaton asked.
"Tori and I kinda forgot how to change a diaper," Sans said.
"And you're assuming I know how?" Mettaton asked, fixing his hair in the window's reflection. "Doesn't Undyne know? I thought she babysat Toriel's son."
"She doesn't remember," Sans said, shaking his head.
"I'm sorry to say this, but I don't exactly do diapers, darling," Mettaton said, turning to face Sans.
"Well, then it's you who has to deal with the crying," Sans said, motioning for Toriel to come in. Toriel walked in, carrying Frisk who was sobbing at this point. Mettaton sighed and clenched his fists. The crying wasn't that bad, but he knew that it would get worse if things continued like this. He took a deep breath and looked at Toriel and Sans.
"Alright," He said, hesitant. "But you two are helping me." Sans shrugged and held Frisk out to Mettaton. Mettaton hesitantly took Frisk and held her at arm's length. "U-Um, what do I do?" Mettaton asked, trying to keep a straight face.
"First, hold her like she isn't a diseased doggo, and second, lay her down on the couch," Sans said. Mettaton carefully set Frisk on the couch and looked to Toriel.
"Now what?" He asked. Toriel thought for a moment.
"You have to undo her diaper, then clean her using the wipes, then get her into a new diaper. Oh, and don't forget the powder," Toriel instructed as Mettaton followed her directions. He finished and looked at Toriel.
"D-Did I do it correctly?" He asked. Toriel nodded.
"I think so," she said, smiling.
"T-Ton Ton!" Frisk cooed, reaching for Mettaton.
"W-What does she want n-now?" Mettaton asked, confused. Toriel giggled.
"She wants you to pick her up," she laughed.
"A-Alright," Mettaton sighed, picking Frisk up. Frisk cooed and grabbed a bit of Mettaton's hair, giggling. "P-Please be careful, d-darling," Mettaton said, unsure about all of this. Frisk just giggled and started chewing on his hair. "E-Eww," Mettaton shuddered. Frisk giggled and let out a yawn. She rested her head on Mettaton's shoulder and started to fall asleep.
"I guess she's tired," Sans said, chuckling.
"Thank goodness," Mettaton said, setting Frisk on the couch. He went back to the kitchen to finish the spaghetti. Toriel giggled.
"How much longer do you think he's going to be able to deal with this?" She asked Sans.
"Not long, probably," Sans said. "Although, I think I have an idea of how to test that theory…"