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2026-05-25
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1/1
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Avery In Yellow

Summary:

Avery gets possessed by Hastur. Derek doesn't die. Hastur fucks them about it.

NOTE: Avery and Derek do not have canonically confirmed ages. Avery is not 17, despite misinformation on TikTok. Furthermore, Wifies has said he's okay with Slimeknight, which I doubt he would say if Avery was a minor.

Tldr: AVERYTHEMAYO IS NOT A MINOR

That being said, I headcanon Avery as 18 and Derek as 22 so that's their ages in this fic thanks for coming to my ted talk

Work Text:

Derek was being eaten out by a god. 

He thought back on how he got here. He had been trying desperately to find Avery, only for the pain in his head to suddenly go away. And then Avery was there. Avery was fine. Avery told him he'd managed to get rid of the King. 

Derek was so proud of Avery. So fucking proud. He'd somehow managed to change the future Derek had seen. 

Foolishness got the better of him. Even someone as smart as D3rlord3 couldn't see the truth till it was too late. Hastur had outsmarted him, hidden his tracks too well. Avery was acting perfectly fine– and when he broke down sobbing, talking about how scared he was that he would lose Derek, blubbering about how they needed to see each other in person– he went along with it. Because in truth, he'd been scared of losing Avery, too. 

So when Avery drove out to meet Derek, when he collapsed sobbing in his arms, Derek didn't think anything more of it. He simply comforted the tiny blonde. 

A tearful reunion quickly turned to impatient kisses. It had been Derek who kissed Avery first, lost between the glow of pride and the fear of how close he'd come to losing him. 

And Derek hadn't even noticed anything was wrong, until he pulled back to give Avery a proper look. 

Avery had weirdly luminous amber eyes, almost gold. 

For one moment, Derek almost dismissed it. But then Avery stroked his hair and whispered “My Knight,” and chills ran down his spine. Derek knew something was horribly wrong. 

Then he had been dragged out of his house. 

The world shifted around them, things happened so fast. One moment they were standing on Derek's porch, the next in an underground temple of carved stone. Avery had gripped Derek's shoulders and whispered “You want to have sex with me, don't you?” 

And Derek did. The past few days had been an emotional rollercoaster, but Derek loved Avery. Had loved him the first time he saw him, in those visions. 

It all happened so fast. One moment he was standing there in Avery's arms, then he was naked and on a stone dais, and when he finally processed they had teleported somehow, a thick yellow smoke left Avery in a rush, and he swayed and collapsed against the dais, breathing hard. The smoke coalesced and congealed, constructing into a form, and there he was.

And Derek knew he had lost. 

The next thing he knew, Hastur was shoving Avery's head between his legs, and that's where they were now. Avery lapping at Derek's hole and testes with great fervor, while Hastur traced patterns into his back. 

“Thank you for freeing me,” Hastur sneered.

“You… goddamn you. What are you going to do to us?” Derek hissed.

“Why, my lovely knight. Every king needs his consort. Or… consorts.” Hastur purred. “You have proven yourselves worthy to join my court.”

Hastur smacked Avery's ass and grabbed his hair, shoving his head down on Derek's cock. Avery drooled and whined, sucking as best as he could. Derek wanted to cuss out Hastur, but the pleasure swimming in his head was too great.

“You two will service me.” Hastur continued. “You will join me in bed. I can show you pleasure the likes of which you've never dreamed.”

“Fuck… you…” Derek gasped.

Hastur approached him and gazed down at him. “You will.” He leaned down and shoved his tongue into Derek's mouth, tasting him. Derek suddenly grabbed Hastur and pushed him harder against his face. Hastur responded by sucking on Derek's tongue. 

God, what was happening to him? Since when was Derek such a slut?

And yet. They had already lost. There was no point in fighting anymore. Hastur was willing to spare them. And his kisses burned deliciously. 

Avery was still sucking on Derek when Hastur pulled him back. He kissed Avery hard and then took his hand. “Come along, my little vessel.” He reached out and pulled up Derek. “Follow me, my knight.”

Hastur led them through the temple and into a grand room of yellow furnishings, adorned with a massive bed of yellow silk. He laid Derek down on it, kissed him hard, and then turned his attention to undressing Avery. Once that was settled, Hastur removed his own robe. His body was dark and spidery, with many long tentacles. He picked up Avery and placed him upside down on top of Derek. “Taste one another.”

Avery's cock was a good deal smaller than Derek's, with an already reddened head, needy and leaky. Derek took Avery into his mouth, and Avery took Derek into his. They lay there enjoying each other, while Hastur watched. 

After a few moments, Hastur joined them in bed. He laid between them and spread his legs. “Taste me.”

Avery was the first to obey, hesitantly taking long licks of the dark, wriggling mass of tentacles between Hastur’s legs. Derek joined him soon after. 

Hastur facefucked Avery and Derek both, pistoning his hips into their eager mouths. Derek reached for Avery's hand, clinging to the last thing that made sense in this insane world. 

Hastur reached his climax, thick strands of golden goo splattering on their bodies and cascading down their throats. It didn't taste like human semen– less acrid, not exactly sweeter but cloying and thick, a numb flavor. 

Avery kept sucking on Hastur as he was climaxing, determined to drink every drop his Master had to offer him. Derek pulled back and let most of the semen hit his face and body. 

Hastur purred deeply and pulled Derek forwards to ride his face, skillful tongue working with inhuman precision on his cock. Derek had never received such a good blowjob in his life. Hastur teased him, knowing exactly what buttons to press to make him blow a load down his throat. Hastur drank of Derek eagerly, savoring the taste of his new consort. 

Hastur turned his attention to Avery, using his tentacles to tease his cock. Avery twitched and groaned, hips bucking wildly. 

“Come,” Hastur said, “You will submit to me sexually. You will take my seed, and you will bear my offspring– for nothing is impossible in my name.”

Avery came to him, and Hastur gave him burning kisses. He laid Avery down beneath him, and lifted the man's hips. Derek watched breathlessly as Hastur entered Avery, and a surge of jealousy pulsed within him. Hastur noticed this and brought him forwards, stroking his cock with long fingers. “Don't fret, my knight. Soon, you too will take your King's seed.” 

Hastur's fingers on Derek's cock made the man's mind go blank. He watched mindlessly as Avery bounced on that eldritch cock, moaning and gasping like a whore. Avery came uncontrollably, semen spurting from him again and again, crying out Hastur's name. Eventually, Hastur climaxed again, filling Avery with that thick, golden semen. 

Hastur switched their positions– now Derek was being stretched on that impossibly large tentacle cock, while Avery was being given a handjob by Hastur. Derek moaned as the cock hit all his right spots, pounding into his prostate. “H-Ha-Hastur-” He moaned.

“Hush, my lovely consort.” Hastur purred. 

Derek came uncontrollably, many times, before he felt the warm release of Hastur inside him. And somehow, he knew he would bear offspring. 

Derek and Avery took a moment to rest, but were both still intensely aroused. Hastur saw this, and chose to reward his lovely consorts. Silently, he turned over and offered them his hole. 

To their delight, Avery and Derek discovered they could both fit into Hastur at the same time. They thrust recklessly, without rhythm, caring about nothing but chasing their own orgasms. Hastur enjoyed the sensation immensely. 

After a while, they both came over and over, filling Hastur with their mingled seed. He came as well, shooting jets of golden semen all over them, himself and the sheets. And yet, none were satisfied. 

All night long, Hastur and his consorts made love, and only collapsed together when the sun finally rose. Hastur let his consorts and praised them.

Derek and Avery were holding hands over Hastur, each wrapped in one of his arms. They gave each other a look, and Derek wondered what the hell he'd gotten himself into.