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NSFW 18+ Heat!Sans x OC

Piper was the most innocent human Sans had met so far. She always wore these cute sun dresses and she blushed at anything really. He was told a dirty joke in front of her and she had looked so confused. He had quickly taken her out of the bar at that point. No need to expose her to that.

What he didn’t know was that Piper wasn’t nearly that innocent. She’d only been with one person before but she was a talented lover. She had taken the initiative to learn as much about sex as possible to please the man she had been with, though he didn’t really appreciate it. She still had all that knowledge.

The truth was, she had a crush on the shorter skeleton. She had met Papyrus first who introduced her to Sans. She wore dresses all the time, trying to catch his attention. She blushed all the time when he was around. And that time with the dirty joke she’d been so lost in thought about how to tell him that she missed the joke completely.

And now today she finally decided to storm over to his place and confess. She was going to waltz right in and not let him talk until she got it out.

She was in such a rush she forgot her phone and she missed the message from Sans saying he needed a week or so to himself for personal reasons.

Sans looked away from his phone with a groan. His heat had come on suddenly with no warning and it was a bad one. How could he help it when Piper was always in those cute dresses. He found her so attractive but he’d never act on it, she was too sweet and innocent for a guy like him.

He started to stroke himself thinking about her, he’d love to see her amble breasts and hot ass. She had all the right curves. He groaned again and knew it would be a long heat.

Piper arrived at Sans’ place in no time, parking her car on the curb and getting out. She glanced at the small cape and bit her lip nervously. Taking the key given to her she went up to the door and let herself in.

As soon as she was in, she heard loud groans and shuffling from Sans’ bedroom. Worried he had hurt himself, Piper went straight to the door and opened it. What she saw left her paralyzed and bright red.

Sans was holding tight to his cock, rubbing himself. His face was flushed blue and his teeth were parted to reveal a tongue and some fangs. He was some type of wanton display and it made all the blood rush to Piper’s cunt.

“S-Sans?” Piper breathed out as her body shuddered.

Sans froze and his head shot in her direction, his eye sockets black.

“Piper! What are you doing here?,” He hurried to cover himself and his face darkened,“You can’t see this, you’re too innocent, Piper you need to leave!”

Piper blinked in surprise, innocent was a word she was used to being called but she had no clue Sans thought that of her. She recognized that he was in heat, Papyrus had explained it to her when he was close to it so that she’d know not to come over.

A wicked idea popped into her head and she started to walk over to Sans’ bed.

“But, Sans what is that under your pillow?” She murmured with wide eyes.

Sans groaned and thrust up, her voice got to him so badly. And the look she gave him, something in him just wanted to ruin her, to corrupt her. He wanted to see her eyes roll into the back of her head. He couldn’t resist anymore.

“Lay down with me and I’ll show you,” He growled lustfully.

Piper obliged and sat on the bed, she tilted her head as she glanced to his groin then his face.

“It’s my cock, ever seen one before?” He smiled at her.

“Maybe?” She answered with a pout.

“Well here then, I’ll show it to you,” Sans chuckled as he moved the pillow away from his throbbing dick. It was bright blue and already leaking a copious amount of pre cum. To his surprise she immediately reached out to start stroking it. He cried out in pleasure and shock.

“Pi-Piper.” He choked out.

“And why were you doing this? Does it hurt?” She but her lip and looked at him from under her lashes making him thrust up into her hand.

“N-no!” He moaned and her pace on his dick quickened.

“It looks like candy, I want to see if it tastes like candy.” She leaned down and Sans moaned as she wrapped her mouth around his cock. It was so warm and slick. And to his shock she had no issue taking him down to hilt. And her tongue moved all over his erection.

That’s when he got it, she knew what she was doing, she wasn’t as innocent as she thought and he groaned as she sucked hard while nuzzled all the way to his pelvis.

Now that he knew she could handle way more then he thought, he quickly took the opportunity to start thrusting into her mouth, gagging her with his cock until tears popped into the corners of her eyes. She pulled away and licked her lips.

“Figured our assumptions make an ass out of you?” She murmured.

He chuckled and his eye started to glow blue as he flicked his hand so she would be pulled over to him. He grabbed her around his waist and rolled her under him.

“I’d rather worry about the sweet ass you’re hiding in that dress right now, so lets get you undressed.” His grin widened.

She nodded, breathless from his sudden dominance. She lifted her body up as he dragged the thin summer dress over her body and head. Underneath she had no bra on and a petite, blue thong. Her body was made for wet dreams. Sans immediately attacked her rosy nipples with his teeth and tongue. She arched into him with a sharp cry of pleasure. His tongue was so hot and soothing over the sharp nips of his teeth.

His hand slid down her thong to rub at her wet folds. She was already dripping with her arousal. He took the opportunity to slip two of his phalanges into her tight pussy. She whimpered at the intrusion and bit her lip hard to hold in the noises.

“ Aw, come on babe, don’t hold back, I want to hear how much you need me.” He chuckled with a sly look. She nodded and let go, the moans flooding out of her. He made sure to tease her properly with his hand. Sliding in and out, rubbing her g spot and clit at the same time. He didn’t ease up until her hair was mused from her tossing her head about and he knew she was on the verge of orgasm.

“Are you ready for me, my little angel?” He growled in her ear, causing her to shiver with anticipation.

“Y-yes, Sans, oh god, please-” She couldn’t articulate how much she needed him but her voice was so broken with desire, he knew.

“Don’t worry,” He murmured as he began to push into her, the heat making him lose all thought. He groaned as he slipped all the way in with ease. She was so slick and tight; so hot.

“God, Piper, you drive me fucking crazy.” He began to thrust, her whimpers turning to moans as he pulled out and slammed back in. His pace was torture as he went from hard to soft; fast to slow, with no warning.

Piper’s orgasm was coming fast and she began to thrust back with him to increase her pleasure. He could tell she was close and went hard and fast just as she peaked. She screamed out his name and arched her back, her eyes rolling into the back of her head.

Sans was a little surprised at how receptive she was to pleasure but it just turned him on more. He kept the pace up until he was about to come, without warning he slammed as deep into Piper as possible, filling her with his magic. Her eyes widened and she moaned loudly as she felt his cock twitch when he released.

“S-Sans!” She gasped out in shock.

“Sorry, couldn’t resist, I am in heat y'know.” He chuckled with a shrug. He rolled them over so she was laying on top of him, with him still inside her. She blushed a dark red as she felt some of his cum start to leak out around his cock.

“I think we should nap now, I’ll wake you up when I get hard again.” He smiled lazily and closed her eyes, falling fast asleep. Piper smiled, happy to finally have him.