Undertale Lemons

underswap sans x reader

Request from Janette_890
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It was just a normal day spending time with papyrus and sans once more "BELOVED HUMAN! ARE YOU HUNGRY? I, THE MAGNIFICENT SANS! COULD MAKE TACOS FOR US ALL!" Sans said as he started to walk into the kitchen "just a bit blue berry" You answered and he turned back to you "blue berry?" He questioned and his voice sounded more calm than usual "What? It's cute!" You exclaimed as you cuddled him "Papyrus! Why did you do thus to my bandana?!" Sans shouted and papyrus as he was on the ground holding his ribcage from laughing so much "I could help you get it off? But it also looks cute on you" you said walking to the back of him and tried to untie the bow of his bandana "c-cute?!" He said and ran upstairs, you walked up the stairs into sans's room and saw him sobbing a bit.

"I-im sorr-" you got cut off from sans hugging you closely, you cuddle him inside your arms and suddenly realized that his head was right between your Boobs and his tears were making it a bit wet from his tears in between "s-sans?" You stuttered and let him go, he opened one of his eye sockets and looked up. He finally looked in front of him noticing that his head was right in between you breasts "I-im sorry (Y-Y/N)!!!" He exclaimed and let go quickly, he was about to say sorry again but you quickly placed your lips on his teeth, for some unknown reason sans sort of slithered his tounge out and licked your bottom lip for entrance, you opened your mouth a slight bit just enough for his tounge to ram inside and explore your mouth you were shocked by his actions and why would he be acting this way, this was not like the blue berry muffin you gained to know over time.

Sometime later you both separated for air "I'm sorry (y/n)! I didn't mean to do this" he said and frowned slightly to his suprise you only giggled "what's so funny (y/n?" Sans asked and you hugged him closely "don't be sorry blue berry! I love you...I was just suprised by your actions " you explained and you sat on the bed frowning slightly "but hey,....you probably don't li-" you were talking to him and he suddenly placed his tounge back inside your mouth, he separated from your mouth and went down to your neck and started to lick it "ah~!" You let out a soft gasped moan and he pulled away quickly "d-did I hurt you?" He asked looking at the spot he was licking as it was a dark purple-ish colour "N-No.....actually the opposite! I was enjoying that" You said and gave him a quick but passionate kiss, he went back to your neck and started to lick and suck on it as he made a few dark hickeys form "i-is it okay....i-if-" you put a single finger on his mouth "it'll be fine....you won't have to ask" you whispered into his ear and else blushed deep blue. Sans started to lift your shirt up and he suddenly started to gaze into space while staring at your breasts "s-sans?" You said a little embarrassed from him just staring at your chest "huh? Oh sorry! I....was just distracted from your beauty" with that being said you blushed hard and booped his nose "(y/n)? What's wro- nyaaaahh~" he suddenly moaned a bit after you lightly placed a hand on his erect member, he un-clipped your bra and grabbed your breasts "saaans~" you moaned and blushed deeply from his touch and he quickly pulled his hand away "you didn't hurt me sans....like I said earlier, I actually enjoyed that" You said and he started to groop you again and you let out small moans "who's the c-cute one now?" He chuckled and you moaned a bit more as you felt a bulge over your panties, you looked down and noticed that Sans had a bulge inside his pants and he blushed deeply "u-um....is this normal?" Sans asked looking at his pants in worry "yeah it is, on the surface it's called 'erection' from doing something to a woman that satisfied you" you explained as he went lower and pulled down your panties "is it okay if I....try something?" Sans asked you blushed deeply but nodded your head, he slithered his tounge out and licked around your cilt in a perfect circle "s-sans~" you lightly moaned out "y-yes" muffled your his tounge "c-can you go i-in?" You pleaded through a moan and he suddenly started to lick your walls, you arched your back and moaned loudly "S-Saaans~!" You moaned loudly "may I?" He said and put his two finger right at your entrance "y-yes...." You said, he started to insert both of his fingers and you gripped onto the bed sheets. You tried to keep quiet from moaning so loud so you just gripped onto the bed sheets even harder each time he hit your G-spot, after a few minutes you finally hit your climax and he pulled out his fingers and licked them slowly "that's so strange.....it's kinda....sweet" he said after he finished licking your juices off of his fingers, he pulled down his shorts a slight bit and his member popped out 'though I wonder....how is he doing so well? Videos? Tutorials? Maybe he caught papyrus with a girl one time' you thought as he slowly lined himself up with your entrance, he slowly shoved himself in and you moaned a bit in pain and pleasure. After minutes you finally adjusted to his length which was actually bigger than what you thought, he started to thrust slowly in and out of you "f-faster sans! Please" You moaned loudly and he started to in and out of you a but faster than before "heh! If ya want it badly! B-beg for it" he teased "saaans~ please~!" You said a bit louder than before you suddenly felt strange that blue berry was acting like this in the first place, "Louder" You whispered in your ear "Sans! Pl-please!" You said "LOUDER" You growled and you couldn't take it anymore "OH GOD SANS~!!!! PLEASE~!" You moaned out loudly as he started to pound into you. The bed started to rock and hit the wall as sans started to pound into you "(Y- Y/N)!!!" He shouted in pleasure as he suddenly bursted inside you"SAAANS~!!!" You yelled in pleasure as he collapsed on top of you breathing heavily.

He rolled off of you and onto a spot on the bed "I live my blue berry muffin" You cooed and fell asleep inside his arms rather quickly "I lov-" he was interuped from a gasp "SANS?!" Papyrus said as he stood inside the door way "papy?! H-how long have y-you stood there for?!" Sans said in fright "long enough to see you cum inside (y-y/n)" Papyrus said in shock at seeing his brother "MY BROTHER IS FINALLY A MAN" Papyrus suddenly bursted, but to his suprise he looked over and saw a broken window "oh shit...." Papyrus said and rn out the door to go looking for sans

(Little funny slip from inside the washroom)
"I didn't know swap had it in him" fell said as he had his head against the washroom door listening "What happened anyway" underfell frisk asked fell sans, warrior sans suddenly grabbed fell frisk and ran away from the house "NOPE NOPE NOPE NOPE NOPE NOPE NOPE NOPE NOPEY NOPE!!!!" Warrior yelled still running away with fell frisk in his grasp

(Why blue berry?! T^T)