Undertale AU Oneshots, lemons, or fluff *REQUESTS closed*

Your too innocent. Underfell sans x reader lemon (Not a prank!)

Request by: AnoyingDog2003
Here is a real lemon guys, Glitz is still in the hospital so, Minto is here this time. AND THIS IS NOT KID FRIENDLY, just a warning! Enjoy my kittens!
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Y/N POV
I walked over to Sans house. I needed to ask him about our 1 year anniversary, that was in a week. I knocked on the door. Papyrus answered.
"Oh, hello Y/N. You must be here to see Sans. I wouldn't right now but your welcome to come inside." He tells me,'Not see Sans right now? Why?' I thought as I sat on the couch, Papy went into the kitchen. I looked at Sans door, I thought of why I shouldn't, shrugged my shoulders, and went upstairs. I heard a light moan, come from his room. It felt really hot all of a sudden, the door was opened just a crack. I peeked through to see Sans sweating and panting......my name. It made me a little horny. A little puddle of red goo was on a pillow beside his dick. His eye was activated, he looked around his room, and saw me. He got up and slowly walked over to me.
"How much did you see..?" He asked a blush evident on his cheek bones.
"I....uh.....only saw.....you lying there...." I swallowed, I was so nervous. He smirked at me, shaking his head slightly.
"I want to do so much to you, kitten." He looked at me, lust covering his expression. I nodded slowly, I don't know why, but I felt like I wanted him to. He pulled me into his room, shut the door and then pushed me against it. He bit and licked my neck, and I let out a slight moan when he found the sweet spot, he grazed his sharp teeth against it, making me whimper, wanting more. He kissed me, forcing his tongue into my mouth. I moaned at this, he picked me up and put me on his bed, not breaking the kiss. He pulled off my shirt and bra.
"Wow...." He stared at my boobs. I began to get a little sub-conscious and moved to cover them, he quickly pinned my hands above my head.
"Don't hide them from me, I like them." He whispered in my ear, sending shivers down my spine. He placed his mouth on my left boob and started to suck, bite, and lick, while messaging the other. I got even more wet, down below. He was tired of that method of pleasure, and went to my shorts/jeans/skirt and pulled them off. Then he pulled down my panties with his teeth.
"Wow your already soaked and we haven't even gotten to the fun part." He chuckled. "Wonder how ya taste?" He said as he plunged his tongue into me, causing me to gasp at the new feeling. Not long after a knot began to form in my stomach.
"Saans?!" He chuckled again.
"Let it happen, sweetheart." With that the knot went away, and something seeped out of my entrance. "You taste so sweet." He said licking it up. I was out of breath.
"What just...... Happened?" I asked, new to this. He looked as if he was going to burst with laughter.
"Your too innocent.Ya cummed, sweetheart." He said shaking his head. "But it's cute." He then kissed me, and I felt some pain force its way into my entrance, it kept going farther, the pain started to increase, tears rolled off my cheeks. Sans wiped them away.
"Relax, sweetheart, it'll go away soon." He told me, as I looked down to see that he had put his penis into me. I tried to relax, eventually the pain went away, Sans saw my face and started to thrust slowly, pleasure was all I felt. I moaned loudly. He smirked and started to go faster, and harder. He hit a spot that made 'cum' again. Then I felt a warm liquid shoot into me.
"SAANS! What is in me?" I ask, extremely concerned. He chuckles, and looks at me with laughing eyes.
"My cum, once again you prove to be too innocent for this world." He snuggles his head into my neck, this is something I know how to do! I immediately snuggle back.
" I love you, my innocent (Y/N)"
"I love you to, Sansy." And we both fell asleep.
Papyrus POV
'I warned her.'