Chapter Text
"Hey, Sans?"
"Yeah babe?"
"Mind if I ask you some more questions?" You're thinking of a few... very specific ones.
"Only if you're gonna hurry, I'm 'bout to fall asleep," he says, punctuating the sentence with a yawn.
"You remember back when we watched Undyne and Papyrus train, right?"
"Yeah, what about it?"
"Well, Undyne said, you know...?" you trail off, hoping he'll finish the question for you.
"Undyne says a lotta things, somethin' specific you're askin' for?"
"Back when we all watched Papyrus and her training. She said that offering your soul to someone was almost the same as offering to have sex with them."
You can see the glow of his blush as he replies. "Oh, uh, that. It's sorta complicated."
"I've got time."
"Heh. Well, it doesn't just mean a sexual invitation, no. But it can be. Your intent matters a lot when you touch someone else's soul. Papyrus doesn't have any of those kinda desires for Ferrin, so neither of them felt anythin'. Undyne and Al, however... Well, ya get the idea."
You mull over this new information, and make an abrupt decision. You know it's probably a bad idea. After all, this is only your third date. But maybe some of Ferrin's paranoia had stuck with you, because you have the vague feeling that if you don't do this now, you may not get another chance.
"Sans, will you do the thing with your hand? The one that summons my soul?"
"Uh, sure thing?" he says, and your soul is hovering in front of you. The little golden flames flicker just a bit, and unless you're much mistaken they appear to be more active than before. Well, you suppose sexual desire was compared to fire pretty often...
You put your hands around it and then present it to Sans. His gaze flickers from your outstretched hands to your soul, obviously in shock.
"D'you know what you're sayin' there, babe?" he asks, his voice a bit deeper than usual.
"After all of that, I'd have to be an idiot not to," you reply. "I mean, if you don't want to, that's fine too."
He reaches out, hands stopping just a few inches from yours. "No, that's not it... But are you sure 'bout this? I don't want you to regret this in the morning."
"I won't. I'm not exactly a virgin either, you know."
His eyes dart up to meet yours. "Really?"
Oh. Was he disappointed? "I... well, yeah, I'm not. A virgin, I mean."
"That's actually kind of a relief," he says. "I was worried. I, uh, maybe did some research online about human sex. Human virgins apparently feel pain the first time, and I’d hate to hurt you."
The block of worry in your chest melts into a puddle of sappy happiness. He'd been that worried for you, that concerned about you enjoying yourself.
"Sort of a myth, but yeah, sometimes. So you gonna take this or are we gonna sit here talking all day?"
The corner of his mouth rises just a bit, but he still looks serious. His eyes lock onto yours as he draws his own soul out. One of his hands moves under yours, while the other holds his soul out for you.
"If you're really sure 'bout this... I'm definitely not gonna say no."
You carefully transfer your soul into his hand before placing your hands under his. His soul floats softly into your palm as he removes his fingers from underneath.
His fingertips connect with your soul gently, but they still send a shock through your body. Before, he'd been touching your arm. Now? Now it felt like he was touching you intimately, stroking your back, ghosting his hands across your chest, fingers pressing into your flesh.
"Holy shit," you whisper. Sans chuckles and moves his hands back. Your soul rests on one open palm as he leans back into the wall. He grins and looks at you lazily.
"Sorry, I wasn't holding myself back. How about you try instead?"
You slowly extend a finger and press it to the center of the heart. The effect is immediate, wrapping you up in the warmth that is Sans. You smile as it steals over you. Sure, the undertones of sadness are still there - but his soul is made more of love and kindness than anything else. You stroke your finger across his soul, then bring your hands up to touch it. You cup it gently, rubbing your thumbs along the broad sides. You're so fascinated by how it feels in your hands that it takes you a bit to realize how your body is reacting to it. There's a wet warmth between your thighs that hadn't been there before. You freeze, hoping Sans hasn't noticed before you dare to glance at him. The lazy look from a moment ago is gone, replaced by a bright blush and half-lidded eyes that won't quite meet yours. The arousal, you realize, isn't your own - it's his. Well, mostly.
"S-sorry," he mutters. "I wasn't tryin' to do that."
You think your next words over carefully before saying, "Does that mean that you want me to stop?"
You watch as the blue tongue you'd felt earlier darts over lips he doesn't have. "Whatever you wanna do."
You take that as ascent. You resume rubbing your fingers up and down his soul and are rewarded with a slight shiver from Sans. More touching gives you more rewards - his gasps and moans are music to your ears, and he can't help but squirm as you continue stroking. You grin as an idea comes to mind. Your head dips towards his soul and you kiss it softly. The sound of a breath drawn through clenched teeth pushes you further and you slowly draw your tongue over the surface of his soul. Out of the corner of your eye you can see Sans' eyes go impossibly wider. You lick it again, and watch his fingers clutch at his blankets. You slide your tongue across it once more, then take the tip of it into your mouth, suckling. His hips buck and he moans beautifully.
"S-shit," he groans, "Babe, this is just torture."
You slip his soul just a bit further into your mouth before pulling it out altogether. You cup it in one hand as you straddle his hips. The feeling of him under you is different from anything you’ve felt before - his hip bones dig into you a little bit but the feeling is just so Sans that you don’t mind. He looks at you, panting and lustful.
"Alright then. Tell me what you want," you say, grinning.
He looks away from you, his blush spreading further. You smile and bring his soul up to your lips once more. A few more licks and Sans melts under you.
"Fuck, fuck, alright," he moans, gazing up at you. "Gimme that back."
"Nah," you reply, stroking it.
His hips buck upwards again, nearly breaking your concentration.
"Babe, this will be amazing if you j-just hand it back," he says, panting.
You tap your chin, pretending to be thinking about it. He raises what passes for an eyebrow and brings his fingers back up to touch your soul.
"Holy shit," you groan. You're throbbing in places you don't even have as his fingers slide along your soul. You realize that you can feel his lust far more clearly with his fingers on your soul than before. Coupled with your own it's nearly enough to drive you insane.
"Somethin' wrong?" he asks, grinning.
"Stop th-that," you stutter, trying and failing to think clearly. If he wants you to beg for him, you're pretty damn close to doing it.
He decides to spare you, fingers lifting off of your soul. You gasp for air, pressing your forehead against the wall for a moment.
"So, gonna give that back yet?"
You shake your head and hand his soul over without complaint. He takes it back and it sinks into his bones as your soul floats back into your chest. You watch as magic flares in his ribcage, then moves downwards to pool underneath your hips. You gasp as you feel something hard and hot press between your thighs.
"Wha - you can do that?" you ask.
He grins proudly. "Yup. I think you're gonna like what I can do to you with it, too."
You rub yourself against it just a bit and are pleased with the reaction. Sans' hands tighten on the bed sheets as he strangles another gasp and his gaze grows hungrier. You aren't about to give him what he wants though. If he wants to play dirty, you're game. You repeat the motion and feel his hips rise to meet yours. Your hands play softly along his ribcage, finally reaching up towards his collar bones. You stroke them and are rewarded by a full throated whine from Sans.
"You like that, huh?" you ask, watching him come undone.
"H-heh. I uh, think ya al - already know the answer to that one," he responds.
"I thought you'd reacted to this earlier. I want to make you feel good. Show me how?" you ask.
"I, uh, ah fuck it," he says, pulling his shirt off roughly. "My ribs and my spine.... please."
Oh damn, well, there goes some of your control. You reach out and brush his ribcage with your fingers. He makes a sound of encouragement, arching into your touch. You stroke along his ribs, earning you another moan.
"Damn, it feels good to have someone else touching there," he pants.
Your fingers rub along the inside of his ribs, covering as much space as you can. His moans and sounds of encouragement - "Oh god yes" "There, right there" "More" - let you know that you're doing it right. You slowly slide one of your hands further in, wrapping your fingers around his spine. He bucks his hips upwards as soon as you get a firm grip, groaning even louder than before.
"S-shit, oh man, so g-good," Sans says. He looks like he's in ecstasy, just a bit of blue saliva dripping from the corner of his mouth.
You keep going, stroking between his ribs with one hand and touching his spine with the other. You've just begun slipping your fingers towards his pelvis when he grabs your hand.
"Stop, gimme a sec," he says, panting.
"Did I do something wrong? I'm sorry, I thought it was okay."
"No, it's just that if you keep doin’ that I'm going to cum in my shorts, and neither a us wants that."
Tempting as that was, you really do want to experiment with whatever he's created in his pants. It's still there, glowing larger and brighter than before. You want it now, want to feeling of him inside of you, throbbing and hot.
"Babe, you keep lookin' at me like that and I'm not gonna be able to hold myself back," he growls, pushing you down with a hand to your shoulder. You comply, falling back on the bed. He straddles you and you can feel his hands grope your chest through your clothes. His fingers slide across your nipples and you let out a small moan. His fingers slip under the hem of your shirt, reaching around your back to unhook your bra. You arch your chest to allow him easier access and watch as his expression grows hungry again. His fingers fumble on your bra.
"I - uh.... How?" he asks, and you can feel his fingers trying to figure out how it works.
You snort and sit up, making sure to take advantage of the situation by pressing your chest into his ribcage. You expertly reach around your back, pushing his fingers aside to unhook your bra for him. Your shirt and bra are thrown aside, lost somewhere on his floor. Sans stares at your exposed body for a moment, not touching you, just observing.
"God, you're beautiful," Sans whispers, bringing his hands back up to your chest.
You moan again as he moves a fingertip across your now exposed nipples. He leans down and the glowing blue tongue from earlier is back, tracing circles around the most sensitive areas of your breast. His teeth ever so gently pull at your nipple and you moan louder, arching your chest into him, demanding more. Instead he chuckles and leans back, his hands kneading your chest.
"You like that, huh?"
"Yess," you hiss.
He grins wider and you watch as he dips back down. His tongue feels amazing on your breasts, warm and wet and slippery. One of his hands leaves your breast and moves downwards, sliding across your stomach and down towards your pants. He slips his fingers under the top of your pajamas, infuriatingly close to the pulsing heat that so desperately wants him before pulling away from you. You make a sound of protest and receive only a chuckle in return. He slides your pants and now soaked panties off, then strips off his own shorts. You can now see his glowing blue member, larger than you'd been hoping for and already rock hard.
"Oh, god, Sans," you groan. “Stop making me wait.”
"Just a bit longer babe."
He pushes your thighs apart gently. His fingers brush against your sex, pausing for just a moment when he feels how soaked you are.
"Babe, you really want me inside you that badly?"
"Now you're just teasing me," you say.
He chuckles, his voice even deeper than usual. "Maybe I am. But damn, you look so hot when you're turned on."
You gasp as his fingers slide over your clitoris, and you can feel each of the joints running over it as they move downwards until they're just touching the opening of your slit.
"Want me to keep going?" he asks.
"Yes, yes, please, yes," you moan, and he does, sliding two fingers inside of you as far as they'll go. He starts moving them slowly in and out, thrusting them inside of you. You moan but it's too slow, almost painfully slow, so you reach out and grab ahold of his ribs again. You stroke them slowly, almost as slowly as he's moving inside of you.
"You're - hhh - you're really damn good at that," Sans growls, picking up the pace. You speed up as well, moving your hands over areas he'd liked earlier. His low pleasured moans go straight to the heat already driving you insane between your legs.
"Sans, please!" You can't take this anymore, you need him in you now.
"Please what, babe?"
“You know what I want.”
“I want to hear you say it. Your voice is so fucking hot right now, tell me what you want me to do, [your name].”
"Sans, please, I need you in me. Now. Please damn it I need you to fuck me now," you beg.
He doesn't reply, but you can see his magic flare in response to his desire. He moves back and positions himself. You arch into him as you feel the tip of his penis press against your slit. He enters you slowly, filling you up with his cock until you want to scream in pleasure.
"You like that, huh? Do you like having me inside of you?"
"Yes," you moan. "God, it feels so, so good."
He seems to like hearing that, and begins sliding in and out slowly, obviously trying to be gentle with you.
"Faster," you gasp out.
"You sure babe? I don't wanna hurt you," he says.
"Faster, please," you groan.
And he does, upping the pace until he's ramming himself into you with every thrust. Your head is going blank, and his groans tell you he's enjoying himself as well. He pulls himself nearly all the way out and you moan in protest before he slams himself back inside of you and you groan out your pleasure.
"Shit, babe, you feel so fucking good," he moans.
You reach up and pull his face towards yours, sliding your tongue in between his teeth in a sloppy kiss. His tongue meets yours, one moment filling your mouth, the next drawing you back into his. You break away to gasp for air and he grabs your breast again, flicking his tongue across your nipple.
He picks up the speed once more, groans and gasps escaping his gritted teeth. You feel amazing, the feeling of him driving into you pushing you ever closer to your climax. You can feel your core growing hotter and tighter around him.
"S-shit, Sans, I'm about to -!"
"Say my name again," he groans.
You do, chanting his name and clutching at his rib cage in desperation as his thrusts drive you ever closer to the edge. Finally you can't hold on any longer, you can't, any more and you'll go insane -
"Fuck, I'm going to, oh god, [your name] I'm - cumming!" he groans, his cum coating your walls, hot and wet. You climax at the same moment, body getting impossibly tighter before your muscles go lax. Sans’ conjured cock vanishes and he collapses beside you.
You both lay there gasping for air, thoroughly exhausted. After a moment, you turn and curl into him. He moves onto his side and rests his forehead on yours.
"That was... amazing," you say.
He grins and says, "Yeah, babe, it was. You felt amazing."
"Regretting it yet?"
"Nah. How about you? Looking forward to -"
"Oh my god Sans not now don't you dare - "
"Another trip to the bone zone?"
You groan loudly, smacking him with a pillow. "We just had sex for the first time and your first instinct is to make jokes, oh my god."
He laughs, pulling you to him in a tight hug. You grumble but throw your arms around him anyways, snuggling as close as you can.
"You like my bad jokes."
"Mmph," you reply before yawning.
"Yeah, me too. 'Night, [your name]."
"'Night Sans."