US sans x reader lemon

"Private Date"

You and sans are on your way back from your double date with alphys and undyne. "We better be on our way you guys. Me and undyne are going to my place for a 'private date'." alphys says, making undyne blush. "OK, but whats a 'private date'?" Sans asked, not aware of your face, fully red. "Ummm. You see, you and (y/n) could go to a place only you two can be together. Preferably a place with a bed and..." undyne covered alphys's mouth before any more things could be said and ran off with her. "Ummm... bye i guess. (y/n) let's get back home." sans said. You asked why, he leans to your (Left/Right) ear and whispers "I want to have a 'private date', too~". With those words, you feel a rush of heat take over your body and your face gets redder than before.

You both enter the house and locked the door (there is a key under the mat out side so papyrus can get in) then sans leads you to his bedroom and you ask him, partially choking up "Why are you b-bringing me to your room?" but all he said was "Well its a room with a bed, we could be by ourselves since papyrus is in Waterfall for something, and I feel we are finally ready for this kind of thing, wouldn't you agree my kitty~". You nodded in response, because if you try to respond you'll just stammer and mumble. Sans opens the door for you and you thanked him while walking in, but as you did he gave your butt a little tap. You blushed and was about to confront him but he grabbed you by your hips and started kissing you on your neck. Feeling his warm breath on your neck felt so good, but you push him off you and asked "Where did this side of you come from?" "What do you mean?" He asked "Well you've been acting a bit lusty lately, and your usually cheery and care free; so what's got you acting like this?"

Sans response was a definitely shocking for you, as he says while his whole face is light blue "Well I've been in heat for the past two weeks, and when I try to get rid of it, I end up thinking of you and it makes it more and more worst. So I started to do some research on how to seduce people so I can rile you and get you hot and I just-just love you a-a-and I want t-to do this type of thing w-with you (y-y/n). So just let me f-fuck you!" He starts covering up his face, embarrassed of the things he said. You gave him a comforting grin, moved one of his hands out of the way from his face and said "Well, why didn't you say anything in the first place sans?" He looked at you kind of shocked, but said "W-well I didn't think you would want to do something like that.""Well~ why don't we do this thing then, 'cause right now, I'm definitely ready to do this with you, my sweet sugar skull~". He uncovered his face and locked the door.

You both head for the bed. sans sits down first while you do a strip tease for him. Sans started to blush again as you slowly unhook your bra and then slip your panties fully off. You see the glowing blue bulge in his pants glow brighter and get bigger, so you walk over to him, get on your knees, and started undoing his pants. "(Y-y/n), p-p-please s-suck me." he begged. You start licking the tip, twirling your tongue in a circle making him moan like crazy. You start sucking the head and slowly putting more of his cock in your mouth. "(Y-y-y/n-n)" he moaned as he started grabbing onto your head, forcing more of his cock in your mouth. Your gag reflex starts becoming non-existent and sans starts filling your mouth with his thick cum. "I-I'm so sorry (y/n), I didn't think that much could come out of me." he said, part of your face covered in his blue goo. You wipe your face and said "You don't have to apologies, sans. Now~ do you want to be on top or bottom~?" blushing he said top.

You lay down on your back on his bed, you signal him to get on top of you and he does. You feel his head touch your "lips" and you let out a light moan "You ready (y/n)" sans asked and you said yes. He starts putting it in slowly, you feel slight pleasure and pain at the same time. Giving low grunts, he says "I'm going to *huff* start moving *Hnng* okay?" "Okay." is all you managed to get out of your mouth before he starts thrusting slowly, not so rough and deep. Both of your moans fill his room, along with his bed creaking and him thrusting into you. "M-More s-sans, please" you moan looking into his eye sockets "*huff* okay th-then (y-y/n)" he said between grunts and moans. Sans thrust starts to get harder and deeper inside you, making your moans more loud. You both start gripping the bed sheets more tightly and feeling as if your the only two in the Underground. Now you are reaching your limit, but sans starts to move faster, harder, and deeper, making you both go completely out of your minds moaning, groaning, and light swearing under breaths. "I-I *huff* LO-LOVE Y-YOU (Y-Y/N)" he says loudly as hes thrusting more in you "*ahh* I Love *Hnn*y-you, t-t-too" you say managing to try and keep quiet. You grab onto his head and kissed him on his teeth. You can feel both you and his tongue intertwine with each other, making both of you shiver in pleasure. "I-I'm c-cumming s-sans" you moan "Yes *Hnng* Yes, cum *huff* cum for me (y-y/n)" He said. Moaning with ecstasy, you came on his member while he's still thrusting, make it more and more pleasurable as it goes along. "I-I'm gonna cum!" Sans says as the speed of his thrust increases speed. "Yes, cum cum in me" you beg him. Suddenly you feel something warm filling inside of you and that made you and sans moan long and semi-loud. Both you and sans are breathing heavily, than sans manages to say chuckling"That *huff* was a*huff* amazing (y/n), we should*huff* do this more often. Mweh he he he" you just grab his face and kiss him on his teeth and he starts kissing you back. After the kiss, he pulled out and you feel the still warm liquid slowly pore out of your pussy. "Wowzers, looks like we have our own waterfall here." both you and sans start to laugh for a little bit, then you say "Well, we better go to sleep then." "Yeah," sans says "we should, good night (y/n) I love you" giving you one final kiss, you both go to sleep, and in your dreams you both see each other happy together.

You hear a noise in the closet and decide to check it out. You hear heavy pants, you open the door to see papyrus in the closet, hand covered in his own cum, panting. "What the fuck" you said quietly so you wouldn't wake sans up "Why are you in his closet and how long were you in there?" you asked kind of embarrassed. "Well," papyrus began "The thing is..."