Warnings: BDSM, reader is sub, sans is a power bottom, pet play (sort of)
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You awoke groggily, sitting up from your awkward position on the floor. You quickly realized you were inside Sans's shed- the one next to his house that you hadn't been able to get in before. He must have locked you in after you lost against him at the edge of Snowdin. It was chilly, and the fact that your shirt had disappeared didn't help.
You pulled at the collar around your neck, but it was no use. The tough leather was chained to a wooden post; your best chance at escape would be cutting the collar itself. You looked around you for something you could use.
A cardboard box labelled "toys" caught your eye. Dog toys, maybe? Sans definitely seemed like the type to be into that kind of thing, and given the environment he might even be a masochist- which meant there could be something sharp inside.
You maneuvered your body until you could touch the box with your arm and pulled it towards you. You blushed upon realizing that the label had not, in fact, been referring to dog toys- at least not intended for actual house dogs (one might consider Papyrus a dog, given the way he acted around Sans [who calls their brother "master"anyways?]).
The box was full of sex toys- dildos, vibrators, collars, leashes- there were even a few cat ear headbands, which upon closer inspection, were sticky. Your hand recoiled on instinct and you carefully put everything back in the box.
You'd just started to close it when the sound of the door swinging open interrupted you. Sans entered and closed it behind him. His revealing yet sharp armor made him look cute, intimidating and sexy at the same time, which you hadn't even thought was possible. This 'distraction' had also cost you the battle earlier, and it seemed like Sans knew it.
"Looking for something?" he said, smirking. You blushed and remembered you didn't have a shirt on, quickly crossing your arms over your chest. Sans chuckled at your embarrassed reaction and kneeled down to your level so he was sitting right in front of you. His outfit was even hotter up close. You couldn't help but wonder if he had a-
"My eye-sockets are up here, pet," Sans grabbed your chin with one hand and locked his gaze with yours. "I can't blame you for admiring the view, though," he teased.
You attempted to change the topic. "W-what are you gonna do to me?" you stuttered, unable to look at the skeleton directly.
"Whatever I want," Sans smirked. You turned about as red as his scarf. "But you'd like that, wouldn't you?~" he asked seductively, running his hand down your neck. You shivered at his touch.
"Yes, I'm going to do whatever I want with you, pet," Sans said, his voice lowering to a husky whisper. The skeleton grabbed the chain that held you and maneuvered himself until he was sitting on your lap. He could feel your breathing speeding up and a slight nudge against his crotch.
Not having had any sexual encounters since you'd fallen underground- at least two weeks ago- you were quite pent up. It'd be a lie to say you weren't into this; in fact, he was extremely your type.
So when Sans leaned forward, still pressing his crotch against your now very obvious erection, you made no attempt to resist him. He kissed you passionately, gently humping your lap. The feeling of a tongue in his mouth caught you a little off guard, but you quickly got over it and leaned into it, surprising Sans in turn. He broke the kiss and let you catch your breath for a moment, wiping a bit of your saliva off of his mouth.
He unbuckled his belt and pulled off his tight pants, revealing a translucent glowing lower body- dick and ass included. You practically drooled as he cast aside the rest of his clothes.
Sans might have made a comment about your staring, but at the moment he was far too horny. He made quick work of your pants as well, leaving your erection at full mast for him to admire.
As eager as he was to have you inside of him, Sans needed to taste you first. He lowered his mouth onto your cock and started sucking, savoring the taste of your seed. You grunted, feeling his tongue wrap around and massage your dick.
You could feel yourself getting close. "Ah- fuck, I-i'm..."
Sans's head popped back up, and he smirked in satisfaction. Before you could ask why he'd stopped, he'd already lowered himself onto you, burying your cock deep inside of him.
You could feel his erection pulsing against your chest and see your own throbbing inside him through his translucent body. It was mesmerizing to watch, seeing his ass engulf your dick repeatedly as he rode you.
Sans gripped your shoulders tightly, feeling your cock penetrate him deeper with each thrust. The combined sensation of tight ass around your dick, moans into your neck and cock pressed against your abs quickly sent you over the edge.
Sans gasped as your seed pumped into him, quickly filling him to the brim. His translucent body became clouded as you filled his ass.
You breathed heavily, exhausted from the extreme orgasm. You hadn't noticed that Sans had as well, but the excessive cum splattered on your chest made it clear he had. You both panted, leaning into each other, too tired to speak. The warmth inside Sans's body quickly lulled him to sleep, still mounted on your lap.
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A/N: i was thinking of was to spice up my writing, hopefully you guys find this interesting
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~Lusting~ Undertale X Reader Oneshots
Fanfic!!! Does contain explicit content !!! A collection of Undertale oneshots. Feel free to request on the request page. Can be angst, Fem!reader, Male!reader, smut, fluff...
