Pulling My Heartstrings (Undertale Au Smut)

Yandere!Dust x Reader

I sat in my room in Nightmares castle, crying softly as I had been for hours. I heard a small knock at my door and peeked up from my pillow nervously, seeing Dust in the doorway and causing me to freeze in fear. The skeletal male started walking closer to be and I shrunk back against the wall that my bed was against.

"Y/n..~" He purred softly, that normal crazed look in his eyes making me that much more nervous. "Darling why are you crying..?" He asked, tilting his head slightly with a sick grin.

"..I-I want to go home.." I muttered softly, the look in his eyes softening ever so slightly before he spoke.

"But daring.. you are home. You're here with me and I'm the one who cares about you"

My heart felt heavy and I curled up, hugging my legs and letting the tears run down my face more. He sat next to me and reached over, pulling me into his arms. I flinched but didn't resist, feeling too exhausted and sad to really do much of anything.

The skeleton held me close, whispering sweet words into my ear as his hand ran down my arm, gently caressing my skin. I let out a soft sigh and relaxed against him, a small sad smile on my face.

I don't know how long we sat like that, but eventually, he picked me up and repositioned me on the bed . My eyes were closed and I was half asleep, the warmth of the blanket and his touch making me feel so safe , my memory from before being kinda foggy . I felt the weight on the bed shift and then something warm was pressed against my lips.

I slowly opened my eyes to see Dust's face close to mine, his glowing eyes wide and his smile big.

"Mm..!" I let out a small noise and my face turned red, Dust pressing harder and slipping his tongue into my mouth. I didn't fight him off, my body frozen and mind racing. His hands started to roam around my body, feeling all of the sensitive spots and causing me to squirm.

The kiss broke and I let out a soft gasp, my body now trembling and my heart beating fast. "Dust.."

"Darling.. I want you.."

He kissed my neck and I let out a soft groan, the heat inside me starting to grow. "I-I've never-"

"Don't worry.. just relax and let me make you feel good"

I bit my lip and nodded, a small smile spreading across my face. His hand slipped between my legs and he rubbed at my clothed sex, my eyes closing and a soft moan leaving my mouth. His fingers slipped past the waistband of my pants and pushed the cloth of my underwear to the side, his fingers touching the outside of my core and sending jolts of pleasure through me.

"You're so wet already darling..~"

I whimpered and hid my face in my hands, feeling embarrassed but also really good. His fingers teased at my entrance before slipping inside and pumping at a steady pace, my hips moving to meet his hand. I bit my finger to muffle my sounds, not wanting anyone else to hear what was going on.

His other hand moved and started unbuttoning my shirt, kissing and biting at my chest. I moaned louder muffling the noises with my hand , my legs starting to tremble. "Ah.. Dust I'm so close.." I gasped out. He grinned and his movements picked up speed, his thumb rubbing my clit and his fingers curling inside me.

I gasped and arched my back, reaching my peak and cumming on his hand. I panted heavily and he removed his fingers from me, licking them clean. "You taste wonderful darling~"

I blushed and looked away, a small whine escaping my lips. He laughed and grabbed my hips, positioning me on his lap and looking at me with a crazed expression. "I'm not done with you yet..~"

"O-oh?"

"You're so naive..~"

I didn't know what he meant but my question was answered when he started removing his own pants, and his warm member pressed against my entrance. I yelped and gripped his shoulders, my body shaking slightly.

"Don't worry.."

His voice was low and it sent a shiver down my spine, his hands rubbing my thighs.

"It will only hurt for a moment"

He thrust up into me and I cried out, tears gathering in the corners of my eyes. I trembled and held onto him, trying to adjust to the sudden sensation of being full.

"Mmm..~"

He groaned and started kissing my neck, his hands running over my body and helping me relax. "You feel amazing darling.."

I whined softly and started to move my hips, causing him to gasp. His grip on my waist tightened and he moved me up and down, the pain slowly turning into pleasure. My moans were loud and needy, and the room was filled with the sounds of our bodies moving together.

"I love you so much darling.."

"I-I love you t-too Dust"

He grinned at my admittance and moved faster, the sounds getting louder. I could feel another orgasm building up and I started to beg, needing to reach the release.

"Please.. please don't stop..!"

"Never.."

He growled and picked up the pace even more, the bed starting to creak. The coil inside me snapped and I threw my head back, crying out in ecstasy as I reached my high. He moaned and followed close behind, his cum filling me.

We stayed there for a moment, panting and sweating. I smiled and buried my face in his chest, enjoying the post-orgasmic bliss.

"I love you, Dust.."

"I love you too darling.. and I'll never let you leave me.. and I'll make you happy and feel loved, you'll never want to leave again~" He purred softly, nuzzling my neck.

I sighed happily and relaxed against him, letting him hold me and whisper sweet nothings into my ear.

I had forgotten why I was crying.