Sans AU One-Shots

Dust || poisonous love.

Pairing: Dust Sans x Female Reader
Prompt: Something changed the night Dust cheated on you, and after some time, he gets fed up with this emotionless act you've got going on. The road to fixing a broken relationship has to start somewhere, but when out on a mission that doubles as a date in his effort to make things right, you both discover that road is a dead end.
Type: toxic, cheating, serious tone, angst
Length: 4k words
Background: You and Dust have been dating for an undisclosed period of time, and how he cheated is left vague because everyone has a different bar for what they consider to be cheating (I might think hugging another girl is cheating whereas you might think having a one-night stand is just fine as long as your partner feels nothing for the other girl) - so it's left ambiguous intentionally.
Notes: This is a combo of two requests from two lovely people. | This is meant to portray the reality of toxic relationships, and that having good moments with the person doesn't mean they're a good person (and rationalizing that sometimes he makes you happy doesn't negate all the toxicity going on). This is not meant to glorify toxic relationships, just give a glimpse into them. Does it end on a good note? Eh, it ends one of the only ways toxic relationships can... 

~-~-~-~

It was hard to believe it had been 4 months since Dust had last seen (Y/n) smile. Granted he knew exactly what caused her sudden bout of emotionlessness, the date coincided with his going out with her best friend, where one thing led to another. (Y/n) said she forgave him, though 4 months later, she still wasn't the same girl he'd fallen in love with, and that was starting to bother him. He'd fallen for her because she didn't mind his past, didn't mind that he saw his brother hovering over his shoulder like a specter to remind him of all the lives he'd taken to end one, and she would do anything to make him happy. But that girl was long gone, and after her hundredth 'I'm fine', he was fed up.

"What's wrong?" He wasn't asking anymore, but when (Y/n) gave him a blank stare, he bit back the harsh words that threatened to spill from his teeth. Papyrus shot him a look to remind him that she was still hurting, though why she remained stuck in the past he'd never understand, so he tried to dial the aggression back a couple notches. "You're acting off, so don't give me that shit about being just fine."

"Nothing's wrong," she said, as bland as a piece of bread, though he swore he'd be able to read the bread easier than her.

"That's bullshit and you know it."

"Brother, perhaps this is time to cut things off," Papyrus said, floating closer to send Dust a sympathetic look. "If she can't trust you again, then why stay in the relationship?"

"You're asking the wrong person, Paps." He shot a glare (Y/n)'s way – one she couldn't see due to the hood he'd pulled up to cover his expression. "Clearly she wants to stay or she would've left 4 months ago." A flicker of unease passed over her otherwise vacant expression like the thought of what happened still stung after all this time, and he heaved a sigh, telling himself to be nice. That was his girlfriend – even if lately they'd been nothing more than acquaintances. "Why didn't you leave?" Apologies weren't his thing, they never had been, and for a while there, he'd assumed their definitions of 'cheating' had been the same – that was until he told her what happened and she shut off within the week.

"I don't need the judgment from the others," (Y/n) admitted, wrapping her arms around herself as her eyes slid over to the door to his room, outside of which they could faintly hear the other Bad Sanses bickering like siblings. "They would take your side, and they already think I'm weak..." She waved a hand in front of her face, gesturing to her glossed over eyes. She was half blind so the others routinely didn't trust her in missions, calling her a liability on more than one occasion, and that was perhaps another reason she stuck so close to Dust: he didn't join in. He preferred to stay silent, letting the others chatter away while he got the actual job done, and due to his aversion to speaking, he got himself a shadow in (Y/n). He figured out quickly just how far she was willing to go for him as a prize for simply keeping his teeth together about her fatal flaw – a fact Papyrus made sure to remind him of like it was Dust's fault she grew so attached so quickly. It wasn't like he was taking advantage of that because she made the decision to stay with him after he violated her trust.