A/N: Worry not beloved readers, this book is not abandoned. I know the title is misleading lol

Ichika and Grillby returned to Undyne and Alphys's house to retrieve their troublemakers. Sans, Asriel, and Daichi were conked out on the sofa after eating a monumental amount of seafood hotpot and playing video games. Asriel was carefully cradled in Ichika's arms and Sans was thrown over Grillby's shoulder like a sack of potatoes. Daichi was hoisted on Undyne's waist with his head in the crevice of her neck snoozing away.

Sans and Asriel were strapped into the backseat and Ichika's lead foot got them home in no time at all. Natsumi and Hizashi both took the sleeping kids up to their rooms. Eijirou was sprawled over his bed and snoring loudly.

Natsumi - "That is definitely Ichika's boy. I swear."

Sans was quietly snoozing as he was tucked into bed. Natsumi fixed Eijirou's limbs and tucked him back into bed. She turned on the dog-shaped night light, kissed both boy's forehead, and left for her bedroom.

Ichika - "The boys are tucked and re-tucked in?"

Natsumi - "Yes and yes. I swear Eijirou is a carbon copy of you. Just like a starfish and the loudest snoring in Japan."

Ichika - "Well Sans is just like you too Miss Perfect. Protective, thoughtful, sweet."

Natsumi - "I know, I'm the greatest wife in the world."

Ichika laughed and set her book and glasses on the nightstand. She cuddled up to Natsumi and laid her head on Natsumi's chest.

Ichika - "Tomorrow's the big day."

Natsumi - "No matter his answer, he'll always be our son."

Ichika - "Nats, what if he does say no? What if he can't stand the tension and moves in with Alphys and Undyne or even Grillby when he moves into his restaurant? We could lose him forever."

Natsumi - "You're worrying too much, pretty lady. Relax and get some sleep. You have the option of keeping the boys out of school tomorrow or waiting till after."

Ichika - "Oh, you better believe I'm keeping my boys home. Neither God -"

Natsumi - "Or the devil can stop you. Go to bed and rest that big ol brain of yours."

Natsumi was met with a loud snore. She laughed, kissed Ichika's forehead, and stuck her earplugs in. She made sure the gun under her pillow was on safety before gathering Ichika in her arms and going to sleep herself.

<~<~>~>

Sans jolted awake and fell out of bed. He saw his reflection in the mirror on the closet door. His magic was activated and his hair was actually on fire.

Eijirou - "Huh? Bro what- Holy Fiery Hecking Heck! Dude what happened to your head?!"

Sans couldn't speak. He was terrified. His magic was going haywire and he had no way of controlling it. He couldn't remember his dream, or nightmare, but he could feel the terror and horror still coursing through his veins. His right eye was glowing fiery orange and red and his left eye was flashing between blue and yellow. The fire in his hair started growing in volume the more he panicked. His bedsheets started catching the fire.

Eijirou activated his quirk and pressed himself against the wall. His quirk prevented him from minor burns and physical damage, but major burns and extreme temperatures would still cause him injuries.

Natsumi burst through the door with her gun with Grilby and Ichika behind her. Grillby took pause when he saw the fire. He walked through the room while taking his flannel night shirt off and wrapping it around Eijirou. He helped him get out of the room and used his magic to extinguish the fire on the bed.

Grillby - "Miss Natsumi, please take your family downstairs."

Natsumi - "What about Sans?!"

Grillby - "Don't worry, Sans will be fine. Please go downstairs. We'll meet you there. Get out of the fire radius."

Grillby closed the door after putting his shirt back on. He took the severely burned comforter and wrapped it around Sans, sat on the ground, and hugged him close.

Grillby - "Sans, I need you to calm down. The fire reacts to your fear like gasoline to fire. If you can hear me, match my breathing. In your head, start counting. Don't stop until you can speak."

Sans could vaguely hear Grillby's instructions. With extreme difficulty, Sans was able to stutter his breathing to match Grillby's. The fire started receding to his head and then the tiny embers that Grillby brushed away. Sans got the two-hundred and seven before he was able to speak.

Grillby - "Are ya back with me Sans?"

Sans nodded his head and turned to press his face into Grillby's chest.

Grillby - "Thank stars. My sweet child, when did you get Fire Magic?"

Sans - "NOt...not Fire Magic."

Grillby - "Sans, tell me what you know, right now. I can't help you with this if you don't tell me."

Sans - "'m part Fire Elemental."

Grillby - "Sans. Sans, who are your parents?"

Sans crawled over to his desk with the blanket wrapped around him so tightly his knuckles were turning white. Gaster's beat up journal was duct taped to the underside on the desk. He pulled on the journal until he fell backward. He crawled back to Grillby and turned the pages until he got to the page of his creation/birth basically outlining Grillby being his second parent.

Sans - "That one experiment I pulled with Asriel's Fire Magic, was to see if I could jump start my own Fire Elemental Magic. I...I'm sorry I didn't tell you earlier, I didn't know what to say or how to say it and -"

Grillby - "Sans, shut up."

Grillby threw the journal aside and trapped Sans in a bone crushing hug.

Sans - "Grillbz, I can't -"

Grillby - "Sans, I'm so sorry."

Sans - "Grillby, what?"

Grillby - "I practically raised you from before you could properly walk, I taught you how to cook, how to speak, gave you your first job for star's sake and I was never actually there for you like I should've been."

Sans - "You didn't know."

Grillby - "I should have known. I should've realized when that damn bastard took my D.N.A or magic or whatever. I should've seen how much you took after me. And I should have known that you were my son."

Sans looked up at Grillby's tear covered face and gave a shaking laugh.

Sans - "Grillbz, you're crying."

Grillby - "Of course I am. You are too Starshine."

Vote, comment, and have a fantabulous day 💖💖😊😊 
1170 words 
Enjoy 

I've wanted to write this chapter for the longest time. Grillby finally knows! It only took fifty-six chapters, sixteen years of Sans and Grillby's lives, and potentially tens of thousands of RESETs, but it finally happened! I hope everyone enjoyed this chapter as much I enjoyed writing it.

This chapter is dedicated to Pegasus_3504. They will be returning home in a month and a half and when she does, I will be putting the book on a two-three week hiatus so I can properly be a nuisance and ignore her personal space.