Sans AU One-Shots

Nightmare || mamá.

Pairing: Nightmare Sans x Female Reader
Prompt: (Y/n) finally returns to the castle after weeks of absence, seemingly acting normal. But Nightmare sees through that instantly, and while she puts on a facade for the boys, she knows that he knows something's wrong.
Type: soft Bad Sanses, more of a cozy vibe (like the end of HS), angst, romantic Noche, teenager Killer/Horror/Dust/Error/Cross (boys)
Length: 3.8k words
Background:
Notes: The people who deserve children the most don't usually get to have ones of their own cuz fate loves irony. Might be based on irl issues but who's to say? 

~-~-~-~

Nightmare felt her emotional signature long before he heard the popping of the frying pan or the excited chatter of his minions. He hadn't felt her presence in his castle in much too long, so as soon as he was done in his office, he made his way to the kitchen to find (Y/n) standing at the stove making stir fry for his rambunctious sons. Killer was practically hanging on her arm, resting against her chest with void-like sockets pinned to her face. She wore a tight-lipped smile as she worriedly fretted about how close he was to the stove, and the popping of the veggies and beef should've signaled him to keep back – a warning he would've heeded if he wasn't a trained killer.

Horror was likely first at the table, and that's where the eerie skeleton resided as he waited patiently for his food, smile stretched wide but almost loving on (Y/n)'s back. Dust stood next to him, hands in his hoodie pockets and face customarily shrouded in darkness, but he was specifically attuned to everything the woman was doing – something that would've come off creepy if it wasn't in a curious puppy sort of way. Cross was leaned against the island counter stationed between the stove and the table, cheekbones dusting a light violet when he almost started drooling at the glimpse of the food as (Y/n) tossed the veggies in the pan. Even Error had swung by, getting situated in a hammock made of his strings because he was too good to simply stand on the kitchen floor, and he hovered in the kiddie corner of the kitchen well out of range of the frying pan but close enough to talk to (Y/n).

Nightmare's entrance was silent and the boys didn't immediately notice him, and while the minions were as they always were - chaotic little vermin - there was something off about the woman. Her emotions weren't normal, and while they'd negatively dipped before due to workplace drama or after a fight with her boyfriend, this level of angst wasn't something he was used to. His turquoise eyelight remained on her figure as she begged Killer to please take a step away from the hot oil since she didn't want to burn him, but when he didn't listen, her inner turmoil almost buckled under the added stress. How very odd indeed.

Error wrapped his strings around Killer's arm, yanking him into the air and making (Y/n) gasp. "Listen to the human, anomaly." His words were anything but friendly, but Killer only smirked up at him.

"If you wanted me tied up, you could've just said so~" Error actually recoiled with disgust, throwing the skeleton towards the table with a flick of his wrist. Killer's spine hit the table with a crunch and (Y/n)'s eyes flew wide with horror. She was already taking a step towards him when he got to his feet and cracked his neck, holding out a hand to summon a knife that he pointed at Error. "Good try. Now let me show you how to actually blow someone's back out." Horror rolled his lone eyelight as Dust scoffed, but Error met the challenge with a wide grin and strings already wound around his flexed fingers.

"Boys." Nightmare's voice was calm, but it seemed to come from everywhere at once while the temperature in the room dropped a couple degrees as he stepped inside, tentacles raised as if inviting any of them to speak out of line. Killer leaned back against the table, rolling the knife around in his hand as Horror rested his jaw on his palm, tapping his fingers against his mandible rhythmically.