(Just want to say that I almost died from chocking on air while writing this, choke count 2 XD, and all I could think was, GOTTA KEEP WRITING, I am dedicated to my sinners XD)
Before you could even finish looking around the room, Papyrus pushed you up against the nearest wall, and slid his tongue down your throat, and started kissing you, rather harshly.
You started to kiss back, and soon enough, Papyrus was sliding his boney hands up your shirt to un-clip your bra.
You preyed away from the kiss to take off your shirt and slide off your bra, you didn't even notice, but Papyrus had already taken off all his cloths and was fully naked, with his (erect ( ͡° ͜ʖ ͡°) ) orange member glowing brightly.
Papyrus slid one of his hands into your trousers/shorts/ leggings ect, and started to play with your clit through your panties.
You started to moan, as Papyrus pressed harder against your clit.
With his other free hand, he started to take off the rest of your clothes.
Once you were completely naked, Papyrus started to kiss you again, even harder than before.
You kissed back just as harsh, but almost instantly after you kissed him, Papyrus rammed his entire member into you.
Papyrus let out a low, pleasure filled grunt, while you let out a rather high pitched squeal in pain.
You could feel tears prickling in your eyes, as Papyrus momentarily pulled out of you.
"you ok?" He had a rather worried sound in his voice. You nodded, as Papyrus reassuringly nuzzled his "nose" into your neck.
He slid his member back into you, and started thrusting, but more gently, and not as deep.
Papyrus started to lightly nibble against your neck, and his gentle breathing (fucking role with it, if he can have a dick, he can breath XD) was sending a chill down your spine.
Papyrus must have forgot what just happened, because he started to thrust his member deeply into you again.
Luckily this time, the pain was 100% pleasure, and you couldn't help but moan loudly.
Papyrus started to bite down on your neck harder, making you moan lightly, in return, you rubbed your hands up and down Papyrus' spine, making him shiver with pleasure.
Papyrus' thrusts were gaining speed, and your body was gaining pleasure.
You could feel your body being banged against the wall from how hard Papyrus was thrusting.
Both your moans were filling the room, screw that, the entire house, despite the door being closed.
You rubbed your fingers lightly against Papyrus' rib cage, as Papyrus rubbed one of his hands down your back, and the other grabbed onto one of your thighs.
You knew you were at your limit and needed to tell Papyrus, you opened your mouth to speak, right as Papyrus came.
He let out a deep moan, as you came just after him.
He still didn't pull out of you, but he wasn't thrusting either, he was just there, deeply in you.
You both took a moment to catch your breath, while doing so, you pushed Papyrus pelvis lightly so his member would be out of you.
"heh, sorry, kinda forgot..." Papyrus, for some reason, actually seemed kind of embarrassed.
You smiled at him tiredly, as he picked you up, and placed you on the bed.
He lay next to you, and he snuggled into you.
You could feel Papyrus bone-r (pffft XD) was still there, and poking you in your leg, so you decided you would help Papyrus out... Once more.
You started to slide down the bed, towards Papyrus' pelvis. He sat up on his elbows, slightly confused.
"what are ya do-" Papyrus cut himself short when you slid his member into your mouth.
You started to slowly bob your head up and down, as Papyrus had a tight grip on the bed sheets.
You became faster, and tried to fit more of his member into your mouth with each bob downwards.
Papyrus was arching his back in pleasure, as your gag reflex was slowly waving goodbye.
Papyrus came in your mouth, just as you had put almost his entire member into your mouth, but to your surprise, you managed to not choke to death, while swallowing Papyrus' cum.
You crawled back up the bed, and lay back down next to Papyrus.
"Can't wait for the next time you're in heat."
"neither can i." You both laughed lightly, and started to doze off, cuddled into each other.
You woke up the next day, around about 8 am, with Papyrus stroking your hair lightly, and his nose nuzzled into your neck.
"goodmornin~"
"Good morning to you too~" You smiled and kissed Papyrus' forehead.
"Well, I'm gonna have a shower, feel free to join me." You said slightly jokingly, but mainly seriously.
"gladly." Welp, there is your answer on how Papyrus took the opportunity.
In the shower you both just kinda joked about, by blowing bubbles from body wash, and making water related puns.
Once you got out of the shower, and changed, you headed downstairs, to be greeted by Sans.
"HELLO HUMAN! I MADE SOME BREAKFAST TACOS! THEY'RE IN THE KITCHEN IF YOU WANT ANY!"
"Great! Thanks Sans!"
You went into the kitchen with Papyrus shortly following after you.
You grabbed some tacos, and talked to Sans.
"So, how was training with Alphys?"
"IT WAS GREAT! BUT SHE HAD TO GO EARLY, SOMETHING TO DO WITH UNDYNE AND HER CAT?" (if you know what I mean XD alphyne, otp <3 XDDD)
"Aww, that's a shame... Wait, so what did you do after that?" You felt your sins crawling on your back.
'Did he come in last night? D-did he hear us? Oh Jesus Christ!' You were sweating nervously.
"WELL, I CAME HOME, AND WHEN I ENTERED THE HOUSE, I HEARD LOUD BANGING COMING FROM PAPY'S ROOM, AND TIRED MOANING, SO I FIGURED OUT WHAT YOU WERE DOING."
"Y-you did?..."
'NO NO NO NO NO, Please for the love of God no...'
"YEAH! YOU MUST HAVE BEEN TRYING TO NAIL SOMETHING TO THE WALL! AND IT DOES GET RATHER TIRING AFTER A WHILE."
"Oh... Yeah, it sure does, heh."
'THERE IS A GOD!'
(Aaaaand that's the sin done with... For now XD Ugh, this took forever to think of, so I'm really sorry if its shitty... Anyway, I hope you liked it X3 And don't forget to leave a comment to tell me what sin, or non sin, to do next! Welp, bye my little sinners~)