Chills | Undertale | Sans X OC | 17+

As I debated on what type of clothes to shop for tomorrow, Sans had returned quite a bit later. He even looked tired with softer grey areas under his eyes, like eyebags. He had only a white shirt on and his sweatpants.

"Hey." I welcomed him to sit next to me on the couch. He plopped down and immediately put his head back and shut his eyes. It seemed reading had definitely tired him out. I smiled and then curled up next to him. He put an arm around me.

It definitely was a bit odd to cuddle with a skeleton. He wasn't soft except for his stomach part and laying against him was a tad uncomfortable but I managed to shift to a better position. I wondered if I should go for being a bit more flirty but I felt my jaw drop when he began snoring. Sans really fell asleep.

I smirked and then slowly crawled on his lap and faced him, resting my head on his shoulder. It felt nice. His stomach was a good cushion and something else was cushioning his lap.

My eyes opened and I blinked in surprised as I realized there was a spot that was soft. I shifted my ass around a bit to feel and squeaked when I noticed the soft spot got harder. Sans had stopped snoring and I watched a smug smile form on his face but his eyes remained closed.

I buried my face in his chest from embarrassment and felt my cheeks burn. His arms wrapped around me and he cuddled closer. This was nice. It-

"...love you."

I shot back and stared at his face which now he had the same shocked expression as me.

"You what?" I asked again. Love me? It's been two or three days in our relationship.

"um. nothin'." Sans nervously tried to move me from his lap but I sat firm and pressed my legs against his thighs to stop him from moving me. I felt something under me get even harder from the pressure.

"Leah." He gave me an exasperated look.

"What did you say?" I wrinkled my nose. Sans wrapped his hands around my waist and tried to lift me again but I grabbed around his torso and hugged tightly. "Tell me!" I pouted, pulling back only enough to see his face. Sans rolled his eyes.

"no."

"Tell me!" I raised my body then slammed down on his lap gently. He inhaled quickly I noticed the bulge beneath me was basically a rock now.

"I didn't mean to say that. uh.. alright?" Sans explained.

I somehow still felt hurt. "You take it back...?" I wilted.

"no! wait.. is that what you want me to do?" Sans asked, clearly confused. I tried not to giggle at him and instead I started to grind a few times against his pelvis. "y...why are you doing that." Sans somehow had small beads of sweat form and his blush darkened on his face.

"Because you won't repeat what you said." I smirked. I already knew what he had said and deep down I felt it too. Our souls connected so quickly and so personally, how could we not love each other?

But I have to gaslight, gatekeep, girlboss through this one because I was NOT saying I love you first.

"st..." Sans seemed as if he was out of words to say.

I leaned forward and pressed my body close to his then kissed his cheek and his chin then 'lips'.

"are you not mad? or uh are you mad and just taking it out on me in a very loving way?" Sans asked, smiling slightly.

I kept my face still and looked him in the eyes. The blush was faded now and his eyesockets were back to a normal size and he had the same Sans smile on his face. Let's fix that.

I put my head on his shoulder and grinded hard against his pelvis and his bulge. I felt him shudder and his hold around me tightened.

"What did you say? Huh?" I whispered in his ear. Sans started breathing heavily and even squirmed a bit as I rocked my hips back and forth on his lap.

"...uh.. don't remember." He managed to breathe out. I giggled silently and then watched his face as I continued to rock my hips back and forth. "y-you sure you've never done this before? because you're rock-"
Before he could finish his pun, I used my hand to rub his bulge very rough. Then I kissed his cheek again and where his ear should be then even got to lick his neck a few times. By the time I was done with teasing him, he was almost panting. I wasn't sure if panting was something monsters just did? Or if he was really out of breath from all of that.

Then...
I got up and yawned and sat on the other end of the couch, kicking my feet underneath the covers.

"Goodnight, Sans!" I said, eyeing his bulge that was practically a glowstick. His mouth fell open and he shifted to turn to me.

"what.. was all of that?"

"You didn't tell me what you said, so no reward for you. Sad." I jutted my lip out and wiped a fake tear away. The lights in his eyes seemed to completely disappear and he stood up to adjust his pants.

"that was brutal." Sans crossed his arms and looked down at me, his pupils returning to their normal size. His blush was completely gone and instead he had a disapproving look on his face with one eyebrow up and a frown.

"It was your fault." I shrugged. He scowled at me like a boy pouting for a toy.

"Oh come on, you're not really mad at me." I snuggled deeper under the covers and put my arm under my head. Sans leaned forward,

"no clothes then."

I slowly sat up and met his eye level and squinted. I knew what I was about to say was extremely risky but I wanted to say it.

"Fuck me, Sans." I whispered.