Undertale Lemons or Smut

Caught in the act. ( Sans x reader )

(Y/n)'s P.O.V.

Ever since, my little sister Frisk (pretend Frisk is your sister) broke the barrier and freed the monster, I decided to move in the skele-bros house with frisk. It was fun living with the skele-bros, but a certain skeleton caught in your eye, Sans. The way he talks, the way he smiled at me, and the ways he makes puns always made feel weird in a good way.

Today, Sans, Frisk, and Papyrus are going to out to buy some ingredients for spaghetti, leaving me here to watch the house. By the time they went out I started to go to up and walking forward Sans's room. I went to Sans's room and quickly jump into his bed. I couldn't help it but just remove my shirt and put on one of Sans's shirt written on was "bad to the bone", squeezing the shirt. For a moment of time, I started to remove my pants showing my (f/c) panties on. I keep on touching myself until I heard a slight creak in the door. I turned around to see sans shocked and blushing blue a bit. I felt like my world broke as I thought to myself that Sans will be disgusted by you and no longer to see you the same. I was about to make a run for it but I felt a bony hand grip in my arm.

Sans's P.O.V

Ever since Frisk and (Y/n) move in I felt love struck when I first met (y/n). I tried not showing my feelings for (y/n) because I was afraid of being rejected. Every time (y/n) was around I always feel the surrounding was heating up.

Today Papyrus, frisk, and I were on our way to the supermarket leaving behind (y/n) to watch the house. I suddenly remember that I forgot to bring my wallet. I tell them to continue on while I go back to get my wallet. I teleport inside the house to only see no one was there. I started to get worried when I suddenly heard many noises in my room. I opened the door to only see (y/n) wearing my shirt while showing off her panties. I stared her for a while until (y/n) notice me. Both of us were blushing and staring at each other until (y/n) started run to the door but I immediately stop her, grabbing her arm.

"Sans, this is not what it looks like."(y/n) said.

"Who knew you were bad to the bone like me," I whispered in her ear.

(y/n)'s P.O.V

I couldn't take it anymore. The way Sans whispered in my ear, his cold breathing hit my neck. It caused me to shudder, but it felt too good.

"(y/n) what's has thirty teeth and holds back a monster?" Sans whispered while nipping my ear a bit.

"W-what ?" I quietly moaned, trying to control the heat below.

"My zipper." Sans chuckled while holding my waist and biting my neck causing me to moan loudly.

"Sans, even though I'm eager to get boned, I am in charge here!" I smirked while running my fingers inside his shirt. I start rubbing his ribs causing him to moan quietly. Sans tried to pull me into a deep kiss, trying to win dominance over me. I quickly push him and grab his ribs tighter causing him to moan loudly.

"Sans, I don't want your kisses.I want your bite." I whispered while holding his sternum and pull him closer to me. I pushed him into the bed and give him a long lick on his cheek. After that lick, I noticed one of his eyes glowed ferociously and a glowing bulge on his shorts. I quickly pull down his shorts and stared at his long, big cock near at my face. I drooled a little bit just watching. I started to rub his blue cock, waiting for his reaction, it twitched a lot during the rub. I decided to stop teasing and licked the shaft of his cock. He moaned loudly as I started bobbing my head up and down on his cock. I felt it twitched on my mouth as I went faster. I was suddenly pushed down, taking all of his sizes. He keeps pushing my head further down as I felt his cold cum running down my throat. I removed his cock from my mouth as he started panting. Some of his blue cum splattered in my face. I start licking off the cum, seductively.