~Lusting~ Undertale X Reader Oneshots

{SMUT} Lust!Sans X Male!Reader X Lust!Grillby

Underlust threesome between Male!Reader, Sans & Grillby.

Warnings: hella gay, mentions of stripping/strippers/public nudity, reader is sort of characterized as shy-ish

Context: In Underlust, "Grillby's" is a strip club and Sans is a stripper.

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"hey, hot stuff," sans said, somehow raising the tops of his eyesockets.

"Oh, hi Sans," you responded, ignoring his blatant flirting. "What's up?"

"weeelll... i'm on break right now, so i figured i could show you around like i promised." Somehow he made even that sound suggestive. "wanna head to grillby's?"

"Sure," you said. This would be a welcome diversion from the looming threat of having to traverse through Undyne's territory.

"cool. i know a shortcut- this way," Sans said, walking out from behind the booth. You followed him as he walked toward waterfall.

"Hey, I thought Grillby's was the other..." your voice trailed off as you realized you were already inside. A few monsters looked your way, but most of them were preoccupied watching the stage or grinding on each other. Loud music blared as rave lights shone around the pub.

"over here!" you heard Sans say. You followed the sound of his voice and made it to the bar where he was sitting. You got on the stool next to him, but felt something under you.

"What the-" you sat up, and the dildo that definitely hadn't been there before rolled onto the floor. Sans laughed.

"careful," he said. "sometimes freaks put toys on the seats."

You rolled your eyes and sat back down next to him. A firey monster in a fishnet crop-top walked over to you from behind the bar, turning to Sans. "...The usual?" he asked, startling you slightly. His voice was slightly... well, you couldn't describe it, but it sent shivers down your spine.

"you know it," sans winked at the bartender, who nodded and turned back to his station, pouring a few different bottles into a set of glasses. You couldn't help but stare at his very defined muscles (how did fire monsters get buff anyway?).

"so, you've got the hots for grillbz, huh?" Sans said, smirking.

Your face turned beet red. "Shut up!" you said under your breath.

"you know, he's definitely been checking you out too."

"What? No way. I mean, I know I've been avoiding confronting him, but you guys are like, not subtle at all. No offense," you gestured to the crowd behind you where every monster was either making out, masturbating or having sex.

San's smile softened. "you know, kid, things have changed since you got here. i think you were right before- when you came down here at first, everyone was trying to breed that tight ass of yours-"

You blushed even harder.

"- but the fact is we've learned from you. down here, everyone is horny all the time, but that's clearly not the case where you're from. we rarely have issues with consent, so we're terrible at communicating. i think grillbz is just doubting whether you actually want him."

You paused for a few moments, deep in thought. "I guess I... never thought about that," you said.

"well, if you're up for fucking him, i'm sure he feels the same way," Sans said.

Grillby walked back up to the bar with your drinks. "Here," he said in his deeper voice.

"ah, grillbz! we were just talking about how Y/N wanted to fuck you!"