You walked into Pap's room, watching the sleeping Papyrus was cute but Sans asked for you to do a favor

Papyrus had tortured Sans a little more then normal and nominated you to get him back, you looked at the things he had given you

Whip
Hand cuffs (x4)
Lube
And a ring

You were surprised, you expected it to be normal torture and now...

Yeah, you weren't going to use the lube because it wasn't supposed to be pleasurable and the whip will just make your punishment after this way too intense then it needs to be

You sneaked over to his bed, tying his arms and legs to the side of the bed carefully in order not to wake him, you had managed to do so successfully then you realized your forgot to undress him, no way are you gonna risk untying him though

You tried to pull down his shirt the best you could, although he woke up

"Huh...? Y/N?! What are you doing?" He then realized the situation he was in, hopefully knowing Sans was the cause of this

You were blushing intensely "blame Sans for this..." You tried to decide what to do first, deciding to stroke his ribs gently while thinking

"A-Ah~ Y-Y/N... D-Don't..." He was blushing intensely, trying to escape

"Why not?~" You were amused by this and started pulling down his pants, stroking his clothed member slowly

"M-Mmm.... C-Come on, don't b-be a tease~" You were surprised by his response but passed it off as nothing and started massaging it

He let out a small moan and you stopped. "Why'd you stop?~" You didnt respond and got on top of him, grinding against him. You both let out a moan as he tried breaking free, wanting to make you ride him

"Y-Y/N... P-Please stop teasing~!" You smirked at his begging and started to take off your clothes and his boxers.

Once you were both undressed (he still had the clothes around his legs/arms) you teased your entrance with his member, precum was already coming out

"I-I know you want me as much as I-I want you~ so j-just ride me already~" you got off and put the ring on, preventing him from cumming. He knew that'll be a pain later on but he could only think about you riding him

You got back into the position again, thrusting the tip of his member in slowly

"W-Why are you such a tease?~" He moaned loudly as you started thrusting him deeper into you, letting out a small moan

"Because I want to be~" you felt his cock throb inside you, signaling he was going to cum. Although the cock ring stopped him from doing so

"Y-Y/N!~" "Yes, pet?~" "o-one request, p-please~!" "And what would you like~" "L-Let me c-cum~!"

You smirked, not moving anywhere to fill his intentions but getting off him and start stroking his throbbing member

"And why should I?~" "p-please~! I'll do anything~"

You smirked, he now understands exactly what you were supposed to do

"Hm... Freedom or being able to cum?~" You expected him to take the second option in his desperation but he was actually able to think correctly

"Freedom!" Fuck

"... And you won't punish me...?" "No, I won't!" You nod and start untying him, he took the ring off

"Didnt know you had a dominant side~..." You chuckled "Sans said the payback items would be in the bag" you gestured to the bag "I didn't know it was that kinda torture... I thought you'd be pleased about me not using the whip"

He chuckled, pushing you onto the bed "Yep, and now its MY turn to show you my dominant side"

"Y-You said you wouldn't-" "I said I wouldn't punish you, never said I wouldn't pleasure you~"

He teased your entrance, earning a little moan from you "P-Please~..." "Now its you begging?~" He chuckled and slammed his member inside, he did leave it there until the pain left though

After a while you bucked your hips into him and he started thrusting

~Time Skip because why the absolute fuck not?~

He came with you, stroking your cheek

"Why... Were you so nice?..." "Because I love you, Y/N..." You smiled at him

"You can pull out, now..." "Who said we were done?~"

"Fuck..."

He started thrusting again

~After 6 rounds because who tf has time to wright all that?!~

You both fell asleep

~And now, a bonus (the entire chapter was made for this exact moment)~

Fell Sans's POV

I walked in my bros room, it seems like Y/N's torture plan didnt go too well...

May or may not have been my torture plan...

What hinted at that was the red cum all over the sheets, Y/N and paps asleep in it and the smell of sex and them

I chuckled and went downstairs, they came down an hour later

"Hey bro, and dirty brother fucker" Y/N's expression was priceless, it was as if she was trying to kill me with her stare

"Don't act innocent, Sans. You told me to do it, I don't keep a WHIP in my room, and certainly not one with 'Return to Sans if lost' engraved on it"

'Busted' I heard pap mutter "well fuck you too, Y/N" "I'm the only one who fucks her, Sans"

"I'm proud but mad... That was a sarcastic pun, Pap..." Pap's face turned from a smug one to horror"

"I just... Fuck..." "Language, bro" I snickered "and yes, you did just fuck Y/N last night"

"You dirty motherfucker..."