"What did you want me here for?" Underfell! Sans asked as he walked into the bright blue room.
"I'm over here, silly," a voice said.
Red turned around to shut the door. He turned back around. "Where?"
"Here..." the voice sang throughout the room. A soft blue light was dancing across Red's vision as something pounced on him from the side.
"Shit! Don't do that to me, Blue!"
He backed up a bit. "I-I'm sorry," the little blue Sans stammered. "Are you okay now?"
"I'm okay, but why am I here again? If Boss finds that I'm missing he'll literally have my skull on a silver platter. Literally!"
"Well, I just can't stand being here without you, Red. I'm so lonely... and lustful..." He started to unzip Red's jacket.
"Whoa, whoa, whoa, whoa. Chill out for a second there, B—mph!" Blue pounced on him, entangling them both into a French kiss. Their tongues colliding with each other, not missing a single place to explore.
The red-eyed skeleton pulled back panting. "What's gotten into you?" he asked as he noticed blue magic spilling from the other's eye socket.
"You!" He kissed him again, a blue glow forming between his legs.
Red knew exactly what was happening then.
It was that time of the year again.
Blue was in skeleheat.
"Wait," Fell said right as Swap was about to kiss him again. "You're in skeleheat, aren't you?" A smile slid across his face.
"That's right, Red. And for that you get a special treat..." The smaller skeleton smiled and went over to the bed. Reaching under it, he pulled out a collar with a chain attached to it.
"Blue..." Red started to say something but was marvelled by what he pulled out next. It was a long, black leather belt.
"Yes?" Blue responded as he motioned the slightly taller skeleton to come over to him.
Red abided and was instantly pinned onto the bed. Arms above his head and hands crossed over each other, Blue began to tie them to together and to the bed post bars.
"Jeez, Blue, I didn't know you had it in ya to do such a thing." A smirk widened into a smile.
Underswap tightened the belt, causing a small moan from Underfell. "You like that, don't you?" There was no response so he put the collar around the other's neck and tugged on the chain.
"Y-yes," Red breathed.
"I'm your new master," he barked.
"Yes, master," Red replied as his neck was given another little tug. He had never seen anything like this before in Blue. All the other times he was in skeleheat, he just wanted cuddles and romantic kisses.
He must be on his ninth heat, Red thought as Blue licked his collarbone. I remember when I had mine...
Every nine skeleheats, the monster will crave dominance and lust after its lover. Sans had gone to Boss not knowing what to do in his ninth heat, so Boss just let him dominate for once to relieve him. But this was a whole different concept.
Red's neck was given an even harder tug as Blue went from his collarbone to his mouth and gave him a rough kiss. The glow in both Sans' pants were growing brighter.
The blue skeleton started to trail kisses down the red one. He lifted up his shirt and licked up and down his ribs, being careful to get every single inch of them.
"Pl-please, Blue... d-don't make me beg..." He was panting again. "You're such a damn tease."
"Then let's get a little more... busy..." Blue smirked as he tugged down his own pants and threw them across the room to reveal a throbbing ecto-pussy. "Lick it." He got atop Red's face. He instantly started to stick his tongue in and out of the hole.
Blue moaned loudly, practically screaming Red's name.
Meanwhile in Red's pants, his ecto-dick was begging for attention.
"RED!" Blue moaned as he came. Red licked all of it up, being as sweet as sugar and continued to lap at it.
"Damn, Blue, you taste so damn good!"
"More, more!" he moaned as he felt a second climax coming. "Faster!" Red obeyed and soon found the sweet juice again, lapping at it.
Almost exhausted, Red asked, "Blue... can my turn come now?"
Blue had almost forgot about Red's desires. "Okay..." He got up and went over to Red's shorts. He ripped them off and threw them across the room beside his pants.
"Can you at least untie me first? You did all the work, why not let me do the rest?"
"Fine... But you have to prove it."
"I will, master," he replied as the belt around his wrists were loosened enough for him to slip his hands out. He laid Sans on the bed and started to bite his collarbone.
"Ngh! Red!"
"Shhh. I'll make you feel good," he whispered. He put his fully erect member into the other Sans' pussy without warning. He began thrusting in and out in a pattern.
"RED! AGH!" Blue was so loud; he was sure to wake up the entire Underground.
"BLUE! Yes, Blue!"
"Faster!" Blue screamed. The other skeleton picked up the pace. "I'm gonna—AGH!" Blue leaked out juices all over Red's ecto-dick, making it easier for him to slide in and out. It wasn't long before he came too, screaming Blue's name as he did so.
"Shit..." Red said as he collapsed next to Blue. "You're amazing."
"I love you, Red."
"I love you, too, Blue."
The skeletons cuddled closely to each other, not even bothering the huge mess that they had just made, and fell fast asleep to the sound of each other's breathing.
Author's Note:
Sue me, bishes.
I love this shipping even though people say it's disgusting.
Oh friggin' well.
Anyhow, hope you enjoyed the smut!
There's more where that came from!
