(We all know what the song is...)
3rd person POV
Toriel guided Chara and Frisk through the Ruins easily, all of them common with the puzzles. Finally the trio reached Toriel's home.
"Chara, Frisk, I haven't had time to make some pie yet for you two. Would you like to help me make some pie?" Toriel asked.
"Yes please!"
"Sure mom." Frisk and Chara said.
They all got into the kitchen and Goat mom got some basic ingredients for the pie.
"What kind of pie would you both like?" She asked.
"Butterscotch and cinnamon pie!"
"Chocolate pie!!!"
Frisk looked at Chara. "So that's why there's always chocolate in the fridge.."
"Er.. how about we have chocolate butterscotch pie instead." Toriel said.
So Chara and Frisk got out the butterscotch and chocolate bars (Chara tried to eat them but was caught.) They put in the ingredients in such a mishmash that Toriel almost had to remake the batter. And the two stirred so determinedly that the batter splashed around the kitchen. ("Just like Asriel and Chara did it..." Toriel said.)

Half an hour later, the butterscotch-chocolate pie was done.
Toriel served the pie to Frisk and Chara and just as Frisk picked up the fork...
"Yoink! Ha the pie is all mine Frisk!" Chara snatched away the plate from Frisk's grasp and gobbled it down deviously while smirking.
"Aww. Chara, my...my pie." Frisk pouted as Chara ate their food with a look that said 'no mercy bro. Deal with it.'
Toriel glared at the chocolate thief. "Chara..give the pie back."
Chara groaned. "But mom..."
"Give. The. Pie. Back. Now."
"Fineee." Chara pouted as they shoved the half-empty plate back to Frisk.
Frisk pecked Chara's cheek. "Thanks, chocolate cheeks."
Chara blushed."F-Frisk! What in the world?!" The pacifist shrugged while grinning and continued feasting on their pie.
After the pie feast, Goat mom read the two fallen children a story that was not about snails and played some games. Then it was time for bed.
"I am sorry my children, but I only have one bed. Er...would you two mind sleeping in one bed?" Toriel questioned.
"Sure goat mom!" Both of them said.
They snuggled tightly for warmth in the bed, legs and arms intertwined together.
"Frisk, thank you for saving me." Chara whispered into the darkness.
"Your welcome, Chara. I love you." Frisk yawned before drifting into dreamland. Chara soon followed, not taking Frisk's words into account.
They both slept peacefully as Toriel watched them in silent joy.

(Short I know butshhhushhhhh. Bye my little galaxies! Oh yeah it's LGBT week and I'm straight but those who aren't, keep being you! 🏳️‍🌈)