Pulling My Heartstrings (Undertale Au Smut)

Error x Reader

I was tied to the bedpost with my legs opened wide and my arms spread against the bed. I whimpered a little to the ball gag in my mouth, pulling against the blue strings holding me down and trying to get some friction.

Error snickered from across the room, glancing back at me. I gave a loud moan as he came back up to the bed and started to stroke my clit again. "Oh, is my whore hungry? My needy, cock thirsty slut?" he asked, looking up at me. He pulled off his pants and boxers, showing his glowing blue cock to me. I groaned and pushed into his hand as best I could. "You're already so wet and I've barely touched you. So disgusting. You really are a needy whore."

He slid his cock into me and I gave a long, muffled moan, clenching around him and panting softly.

"Oh, what's this? Did you just cum from that?" he asked, and I could hear the smirk on his face. "Wow. Slutty."

He thrusted roughly into me, pulling his hand back to my clit. He rubbed it hard, almost painfully so, and I could feel my orgasm coming fast. I clenched my fists and moaned, trying not to cum without permission.

"Go ahead and cum, you disgusting slut," he said. "Cum around my cock, you fucking whore."

I came around his cock and gave a long muffled moan, shuddering as the pleasure hit me. He didn't stop rubbing my clit, even as the orgasm ended. I gave a high pitched whine, my overstimulated body shuddering against the onslaught of pleasure.

"Look at how sensitive you are," he said, still smirking. "What a pathetic excuse for a slut."

"Nng~" I tried to say. He just chuckled and pulled out.

"Now, here's the real question. How many times do I need to fuck your cunt to make you pass out?" he asked, tilting his head. "Should we see? Would you like that, whore? You wanna pass out from getting fucked like a worthless sex toy?"

"Mmm, mmn!" I nodded, giving a soft, muffled groan as he shoved his cock back inside me.

"You're such a dirty little whore," he said, his pace already brutal. "Such a desperate, horny, useless little toy."

He fucked me hard and fast, making me moan and squeal as I came quickly, and then again, and then a third time, until finally, I was a sobbing, overstimulated mess.

"That's three times you came," he said. "I bet I can make you pass out with four more."

"Nnnngh~!" I moaned as he pushed deeper into me, thrusting harder and faster. Tears ran down my face and he leaned down, licking them up with a grin,

"Awe~ The dirty slut is crying~" he teased. He moved his thumb up to my clit and I gave a soft, pained moan, trying to pull away. He laughed and pushed against me, starting to rub again.

"I bet you want me to use your ass too," he said, "Your disgusting, whorish asshole."

"Mmm~" I nodded, clenching around him and giving a whimper as the pressure built again.

"Such a dirty, cock hungry little whore. Do you want me to fill you up? To use your dirty, slutty hole?"

"Nnngh~ Mm mmn!" I shook my head and tried to push my ass closer to him, moaning and panting through the gag. He laughed and pushed my hips back down, his thumb moving harder against my clit.

"Oh? Are you close, slut? Is the pathetic, disgusting little toy going to cum for me again?"

"Mmmh!" I nodded, and he gave a soft laugh.

"Go ahead. Cum for me. Cum around my cock, you fucking slut."

I moaned and came around him, the pleasure sending pain up through my body. He pulled his cock out of my cunt and pushed it into my ass, starting to fuck me. I moaned, clenching tightly around him.