Day one sort of
“oh haha very funny sans, ya’know I was actually worried about you”
You tried to pry yourself off his lap, his claws pierced the sides of your thighs abruptly stopping your attempt.
“in not tryin to pull your funny bone this time doll, I'm serious.”
You threw him a look of large scepticism, you've been the butt of one of his jokes before and you weren't going to let it happen again.
“can monsters even go into heat, none of you actually have a reproduction system. And even more importantly you're a skeleton”
You crossed your arms waiting for the half assed answer he'll try to use to make you believe him, well not this time.
“ah I don't really want to talk about it, I think there's a pamphlet in the kitchen somewhere”
You scoffed, as sans ducked his head down blushing blue.
“ not that i believe you, but why would you keep something like that in the kitchen, what if Papyrus saw it.”
“paps is an adult to ___, not that I like to think about it but he's probably in heat to, being close for years we usually have it around the same time.”
“alright now it just sounds like you're PMS’ing, come on”
“ I don't know what you want me to tell you”
You've been tricked by sans before, each time getting more tiresome than the last, what would make this time any different than the others?
“alright…. show me this “pamphlet”, but if this”
You waved your hand in the air, motioning to the situation.
“turns out to be bullshit, you have to...um lay off all pranks for a MONTH”
You crossed your arms showing complete conviction to your words, him finding this funny scoffed at your cute attempt to be serious.
“alright and if it’s true, what do I get?”
“well what do you want?”
You knew this was a dangerous question to ask, but you couldn't help yourself. Watching the flurry of emotions on his face go by was fascinating, from surprise to confusion straight to a heated smile, the kind that a predator would make when they've cornered their prey.
“so I can ask you for an-y-thing I want hmm”
“IF you can prove that monsters, can go through “heat” which right now you're not doing”
“alright alright”
He stuck out his hand, twiddling his fingers until blue sparks started to appear. It seems like he had to concentrate even harder just to summon it, but in an instant a multi-colored pamphlet appeared out of thin air. You would have told Sans how cool it was, but the way he was breathing and sweating had you too worried to care.
“Sans!”
A wave of magic hit the both of you electrifying the air, making your stomach drop, you reached for something to ground yourself with but Sans was already grabbing onto you. It passed just as quickly as it came knocking the breath out of both of you, sans was making a mess of sounds either between whimpering or growling letting out hot pants of air.
“Sans… Sans what was that HEY”
“grragh Shut it ___”
He wasn't looking at you, he seemed in pain...but still that was no reason to snap at you. You got up, even though he was still clinging on to you for dear life, you managed to pull away. The more you looked at him the more you thought maybe he wasn't kidding. You got up to go get him some water, but settled for the rest of the milk. When you came back he immediately faced you, the intensity of his gaze making you blush.
“I...I got you something to drink”
He was covered in sweat, and panting like he'd been running for days, the lights in his eyes dilating until they formed large hearts. He bolted towards you, In an instinctual fear you recoiled only to be surrounded by his arms in tight brace.
“i...I thought you left, I thought I'd never see you again. Like you'd disappeared and I would have to find you over and over again but you're here… you're really here”
He must've completely lost his mind, you had only left for a second. You couldn't hug him back, your body was in shock what the hell does this ‘heat’ thing do to monsters anyways.
“ You can't leave me ____, you can't…. not again”
A couple hours later Sans finally fell asleep, only after numerous promises that you weren't going to leave. You've left Papyrus 10 messages and called him a total of 23 times, there was nothing left to do except find out what the hell was up with Sans. You tried to search for any type of information online but it only gave very vague facts, after awhile you deemed it pointless and logged off, the piercing cry of your phone calling your attention back to reality.
“paps?!!”
: “___”
“Dude I've called you like 30 times, what the hell”
: “language ___ ,I've been kinda busy”
“you sound awful, are you okay?”
: “I'm fine, what about Sans?”
“He's gone off the wall paps, babbling about not leaving him and other crazy nonsense. What's going on Papyrus”
: “I'm sorry ___ I should have told you earlier, but Mettaton needed me…. erm anyways it might be too late but you two didn't bind yet did you?”
“I don't even know what that is”
: “did you not read the pamphlet, ugh read it then get back to me. I've got to go.”
“wait Papyrus”
: click
“Fuck”
What's with monsters and being so pissy lately, you headed over to the couch finding it sprawled across the floor, some of the pages were badly wrinkled probably due to San’s tough grip.
You skimmed through it stopping at parts that interested you, and reading deeply into parts you didn't understand. Apparently the only type of monsters that went into heat were boss monsters, and that a monsters heat wasn't just for reproduction, it also helped clean up excess magic that the soul couldn't use, making it harder to use their everyday magic. Another part was clearly written by Papyrus as it was way to colorful, written in all caps, and talked exclusively about skeleton heats.
A SKELETONS HEAT CAN BE A TRICKY TASK TO HANDLE. BUT OH SO GREAT READER I AM HERE TO HELP.
STEP 1: PREPARATION, YOU MUST STALK UP ON LOTS OF PROTEIN FILLED FOOD AND LOTS OF MILK, DUE TO THE FACT WE SKELETONS BURN THROUGH MAGIC QUICKER DURING THIS TIME OF YEAR, AND NEED AS MUCH ENERGY AS POSSIBLE.
STEP 2: STAYING RELAXED, A STRESSED SKELETON COULD BE A DANGER TO MANY PEOPLE AND THINGS IF THEY ARE IN HEAT. STAYING CLOSE TO HOME AND THEIR MATE ARE WAYS TO ENSURE, THEY REMAIN CALM.
STEP 3: PHYSICAL CHANGE, AROUND THE SECOND DAY THE PHYSICAL BODY OF SKELETONS WILL BEGIN TO CHANGE SHAPE. CHANGES LIKE GROWING IN SIZE, ELONGATION OF FANGS AND SHOWING OF TAIL.
STEP 4: CARING, EVEN THOUGH WE LACK AN ACTUAL PHYSICAL HEART WE STILL NEED LOVE, SO LOTS OF CUDDLING AND HUGGING IS ADVISED.
This was simple enough, you read on finding a page that read in bold letters BINDING.
“finally”
BINDING
WHEN IN HEAT A BOSS MONSTERS NATURAL INSTINCT WOULD BE TO FIND A MATE, FEED AND NEST THEM THEN COPULATE. THIS TAKING A TOTAL OF FIVE DAYS MAX, DURING THESE FIVE DAYS THE MATE WILL SLOWLY START TO FEEL THE SAME EFFECTS STARTING THE THIRD DAY. THIS ONLY WORKING IF THEY ARE BINDED, TO BE ABLE TO BIND BOTH SOULS MUST AGREE SUBCONSCIOUSLY TO BE MATES. ONCE BINDED IT'S POSSIBLE TO MAKE OFFSPRING….
“I don't know why you read that crap”
A bony arm made it's way over the couch snatching it from your hands.
“you're the one who said to read it, and why are you out of bed?”
He was scanning through the pages, stopping to read the ones Papyrus added. What was really interesting was his bones, they glistened with sweat and looked thicker. And now that you got a look at him, you're pretty sure he grew a good four feet.
“Sans, how long have you been on your heat?”
“does this mean I win the bet”
You knew he'd have that dumb smirk on his stupid face so you refused to look at him.
“seriously, how long?”
“ agh I don't know doll, a day or two”
“that explains your size”
“heh I'm naturally big kitten, you should know”
*silence*
“was...was that a dick joke?”