This takes place sometime during "A Fold in Space" by IniquityHalo (me). It is recommended you read the story first before reading this one shot.

Warnings: noncon, sexual abuse

Pairing: UnderFell Papyrus and UnderLust Sans

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"C'mon Kitten, you can sit down." Lust was holding onto Papyrus's neck, his eye-sockets wide with fear. He had buried his face into Papyrus's shoulder, shaking. Just below him was Papyrus's member, in clear line with Lust's opening.

Lust stood on his knees, trembling. He didn't want to have to hold on to Papyrus, but it was the only way he could keep himself up so he wouldn't have to sit down on Papyrus's dick.

He hated this: him having to cling to Papyrus for dear life when said person was the reason he was doing it in the first place.

Papyrus pulled back a little to look Lust in the eye. "There's no need to be scared, little Kitten." Lust only stared back at him fearfully. The taller skeleton smiled at him encouragingly before reaching back to break Lust's hold on his neck.

For a moment, he helped support Lust, holding him just above his member.

Then suddenly, he dropped Lust. Lust cried out, his face contorting from panic to a pained wince as he was forced to take in all of Papyrus's dick. He shuddered, his entire body taut in pain.

Papyrus reached down, holding onto the back of Lust's pelvis as he began to roll his hips slowly, pulling slightly in and out. Lust gasped, his cheekbones colouring purple. "H-hhh.."

Papyrus watched Lust's reaction with a satisfied smirk. He paused his motions long enough to pull himself up and skim his teeth across the side of Lust's mouth. "I love you so much, Kitty. One day, I'll make you love me just as much as I love you."

Lust was still slightly dazed from before, but he managed to pull his face into a defiant glare. "H-hh, I'll n-never love a psychopath like y-you."

Papyrus's eye-sockets narrowed as he took in Lust's words. He thrusted hard into Lust, forcing his entire length into him. Lust cried out in pain, tears beginning to streak down his face. Papyrus knew he was being a little immature to backlash like that, but he couldn't help it. It made him mad that Lust wouldn't reciprocate his feelings.

Why couldn't he just realise that that was his destiny? Their destiny. They were meant to be together. It was just so frustrating that he kept denying it.

And maybe, just maybe, Papyrus was a little scared that Lust was incapable of loving him. That the hard set in Lust's eye-lights, the coldness with which he had addressed him, meant that he hated Papyrus. That he couldn't stand him.

But he knew that couldn't be. They had sex with each other so frequently. If he hadn't felt anything for him before, Lust had to feel something by now.

Papyrus trailed his fingers down the inside of Lust's arms, making him shudder. Lust was breathing heavily, his eye-sockets lidded in pain and exhaustion.

"I'll forgive you for that because I am a merciful master." Lust looked back at him with a disbelieving expression.

Papyrus pulled himself up against the bedframe to support his back, then wrapped his arms around Lust's ribs, pulling him up. Lust winced as he was pulled off of Papyrus's member, stifling a small moan as he was lifted off.

Papyrus laid him down on the bed, admiring his whole body. Lust shivered at the intense scrutiny, wanting nothing else but to bolt right out of the room. But he knew he wouldn't be able to.

"I want to hear you beg. C'mon, beg me to fuck you." Lust shivered at his words. Of course he didn't want that, but usually Papyrus handled him more roughly if he didn't obey him.

He was so afraid, but he managed to croak out "Pl-Please.. f-fuck me, m-master.."

Papyrus smiled, pleased. "How hard should I do it?" Technically, Papyrus didn't really need to ask him. No matter what answer he gave, he was going to fuck the daylights out of Lust until he was reduced to a trembling mess. But he liked making his pet say it.

Lust swallowed convulsively. He was so disgusted with himself. He shouldn't do this, shouldn't beg Papyrus to fuck him when that was the last thing he wanted. He hated himself for being so weak, so helpless. "F-Fuck me until I p-pass out.."

Smirking, Papyrus leaned over his pet and let his tongue trace the edges of Lust's ribs. Lust gasped, his sensitivity making him moan and buck up towards Papyrus. "H-Hah.."

Papyrus's stare was predatory as he watched Lust squirm underneath him. "We should make sure you're wet first." Papyrus purred. Teasing Lust's entrance, he inserted two fingers in and began to stretch it out. Lust gasped, eye-lights rolling up as he moaned.

"Hnnn.. G-Gah!" Lust tried to pull away, but Papyrus held him fast. Shuddering, he gripped the bedsheets underneath him as he bit his tongue to stifle his moans.

Papyrus brought his fingers to his mouth, licking off the juices. Lust blushed, watching him. Papyrus turned back to Lust, his eye-lights half crazed with want. He leaned down and began grinding against Lust's pelvis roughly.

"A-Ahhh..!" Lust's breath hitched as he felt Papyrus's cock rub up against his opening. He trembled fiercely, his vision blurring from the pleasure and the fear.

Before he could even prepare, Papyrus thrusted his member all the way in. Lust screamed, tears falling down his face as he writhed in pain. His cries were cut off as Papyrus pulled him into a kiss.

"M-Mmph!" Papyrus stroked Lust comfortably as he felt the small body shake underneath his hold. Fingering between every individual vertebrae, Papyrus felt Lust involuntarily arch into him as he moaned softly.

Papyrus broke the kiss, a trail of saliva following his tongue. He looked down at Lust, who was panting heavily, his cheekbones coloured dark purple.

"Why do you have to look so good?" Papyrus growled as he bent down and began nipping at Lust's neck vertebrae.

"Nngh! Ahh!" Lust squirmed at Papyrus's licks and bites."Kitty, you're so sensitive." Papyrus teased, watching the trembling figure in front of him with amusement. Lust shivered, turning his head to the side in embarrassment to cover his profusely blushing face.

Papyrus began to thrust faster and faster into the smaller body. It wasn't long before he was coming inside of him with a possessive growl and a keening sound from Lust.

"Mine." Papyrus's voice whispered darkly next to the semi-conscious skeleton's skull. Overstimulated tears tracked down his cheekbones, the last thing the little skeleton seeing as he lost consciousness being Papyrus's leering, victorious face.