James looked down at his tiny sprite of a boy. He looked barely bigger than a foot tall, but knew things were distorted due to his height growth. Last night he had been a shory waifish guy, and now he was a towering mountain of muscle and fur and sported a thick dark beard to match. He had to be around eight feet tall now, given how close the ceiling had gotten, which put Darius closer to being three foot and a few inches. He was getting less than child-sized. James had to get this attitude problem in check before Darius shrank himself to nothing.
"Come on baby boy," he said, scooping Darius up into his arms. With a swift motion he threw off the boy's oversized shirt so he could cradle him naked in his arms. "Let's get you cleaned up and we'll figure this out together."
"I'm not your fucking baby boy-aaaarrggh!" Darius screamed as his protests shrank him further.
James growled as more inches were added to his own mammoth frame. His feet burst out of his shoes and his nice new jeans popped open at the waist as a seam tore all along his calves. Darius had taken a potent hit as well. James could cradle half his body in his palm now, only that disproportionate ass that refused to shrink spilling out through his fingers. Darius looked even twinkier now too, his face only growing more precious with each bit of size lost.
James sighed. "I didn't wanna do this little buddy, but you give me no choice."
"Wait what are you doing?" Darius squeaked. "I'm sorry Daddy! I'll be good!"
"This is for your own good, baby boy," James said with a heavy sigh.
He sat down on the edge of the bed, feeling it groan beneath his weight, the springs threatening to crack and tear beneath his ginormous backside. He moved his hands over Darius's own ample bottom. James suppressed the urge to whistle. Darius had shrunken so much and his ass had grown so large he was nearly the size of his own bubble butt. It was sexy in its own twisted way seeing the two tiny legs widen into sizable meaty thighs barely supporting cheeks as wide as he was tall. Darius was almost all ass by this point, and every outburst made him only smaller. If James didn't love him so much, he'd be content to watch Darius shrink himself into the perfect sex toy.
But he did love him, even though they'd only met. The warlock made sure of that. Cruel as he was. When the spell was over, they'd lose that love and go their separate ways. Maybe that was for the best, James thought. He just had to ride this out and take care of Darius until then, and to do that, he needed to make sure Darius didn't blow him up to Paul Bunyan levels or shrink himself down to get lost atop his own giant ass.
"Sorry baby boy," James said. "Daddy knows best."
He brought his hand down on Darius's ample cheek hard. The ass cheek wobbled and jiggled and James left a sizable red hand print on it. A tiny squeak of a moan spilled from Darius's lips. James sat back stunned as Darius clamped a hand over his mouth.
James smirked. "Did my baby boy like that?"
Darius looked at him, his tiny beautiful face transitioning from shame and arousal to one of terror, then an unrelenting fury. He balled his hands into fists and began punching and kicking at James as much as he could.
"Of course I fucking didn't! I hate this! You're spanking me you asshole! I hate you, this is all your fault. You should have fucking left me at the fucking bar. What sort of fucked up bullshit is this-ah aaaaaaahhh nooooooo!!"
Darius's screams became squeakier and more boyish as he was hit with the biggest shrinking spurt yet, dwindling down down down while his ass only looked plumper in comparison. The huge cheeks now eclipsed his entire doll-sized body. He was a tiny twink being dwarfed by his own ass, so small that if it weren't for his big bubble butt, James could have easily fit his whole body in the palm of his hand.
The rest of James's clothes gave way as he sighed, the growth ripping through his entire body. The bed beneath him shattered completely under his weight and he sat naked on his apartment floor, barely able to maneuver in tbe room now while he held a tiny naked boy against his lap who,'s big delicious ass looked more inviting than ever.
James sighed, even as his cock dripped with pre.