Dustin woke up later to the sound of heavy moans. He looked up and saw Asmodeus who was getting fucked by giant tentacle plants. It was the vegetation that Dustin infected with his cum. He also noticed that the demon lord's veins and eyes were now pulsating in dark purple. The same color as Dustin's demonic skin.
"HMMMMM Come here"
Asmodeus pleaded in a needing tone.
"I was the one that was supposed to make you mine, but I can't deny this pleasure."
He said as two plants eagerly attached to his nipples and sucked them.
"Haaaaaa All I want now is to feel the same level of pleasure you feel."
Dustin grinned, his eyes now burning as he raised his tentacles to the gigantic demon. "Take me Dustin!" He screamed with an insane grin. The plants then grabbed Asmodeus' arms and legs and locked him in place. Dustin then used his wings to fly close to his face presented his 18ft long and 8ft thick monster cock to him. Asmodeus sucked him eagerly, his hot tongue feeling like it had tiny suction cups all over it.
"Hmmmmm Soooo goood"
Dustin moaned and used his long tentacles to enter Asmodeus' asshole.
"OHHHHH YESSSS GIVE ME EVERYTHING YOU GOT!!"
He screamed as Dustin used all 8 tentacles into his ass, each spreading it as much as possible.
"HAAAAAA YESSS FUCK ME! FUCK ME! FUCK MEEEEEEEE!" Asmodeus's body seemed to become more and more unstable as the tentacle that made his body thrashed in every directions. "FUCK! GIVE ME YOUR SEED! I NEED IT!" Dustin now laughed diabolically, the lord of lust was his plaything!
"YOU WANT MY SEED? THEN TAKE IT!" He screamed as his cock and his tentacles flooded him with his infected cum. "HAAAAAAAAA FUUUUUCCCCKKKKK" Asmodeus screamed as he glowed purple. "FUCK! THIS IS TOO MUCH! HAAAAAAAAA!" He then looked more transparent then before, his demonic soul visible through his skin. Suddenly he fell, not being able to be held by the plant anymore. Indeed his whole form seemed to become more liquid as he moaned in pleasure. Dustin could not believe this turn of event, he laughed maniacly while aproaching the gigantic goo monster. He could still see Asmodeus soul in the middle of the goo. And so Dustin went down on his knees and plunged his dick inside the goo. It was warm and moved like it was still sentient. Then the goo went inside of Dustin's dick. "Haaaa Haaaa Haaaa HAAAAAAAAAAAAA"
The demon's balls suddenly expanded with this new mass entering his body, growing steadily unti they reached Dustin's knees.
"Get in there Asmodeus, nothing will feel better! HAHAHAHAHAHAHA"
More and more goo entered his body, the fluid filling his ass, turning it nice and hard. His waist was next, one by one his abs increased in size, turning into gigantic slabs of flesh. Then came his pecs, he put his hands on them as he felt them push further and further until he could not see his lower body anymore. His nipples also turned fat and full. His shoulders and biceps then swelled in size, he felt like he could carry mountains with these monsters. The goo suddenly sped up its insertion. "OHHHHHHHH YESSSSS!" More growth happened everywhere as his form grew in size. 40 feet became 60 until, when almost all the goo was drained, he reached 80ft. Finally Dustin could see Asmodeus' soul getting drained inside his dick. "YESSSSSSS! YESSSSSSS!" He then unleashed a deafening roar as he absorbed the demon's soul. Black spikes burst from his arms and shoulder, his canines lengthened, large monstrous black claws grew at the tip of his fingers and two new sets of horns burst from his head. "HAAAAAAHAHAHAHAHAHA" Dustin laughed as he felt Asmodeus' dark magic and thousand year old knowledge enter his body. All this power drove him mad. "EVERYTHING WILL FEEL MY TAINT! HAHAHAHAHA" He then unleashed a deep black gas from his tentacles that spread to the nearby plants. They instantly mutated and grew to titanic size. they then opened and milions of tentacles came out of it and fucked everything in sight. "MORE! MORE! MORE!" he screamed in maniacal glee while furiously jerking off his 60ft dick.