Cody began frantically pumping on Matt's gigantic cock, so desperate that he began to vibrate like one of those vibrating wrestler action figures that he swore the little bastard had used to jack off with before. In fact, that's exactly what he was--a vibrating wrestler action figure.
He wished desperately that someone would help him as Matt leaned back in the tub and started to orgasm, Cody finding himself growing slightly taller, but still being made out of hard plastic, but then he saw an unexpected ally: Barbie!
She was only a doll, but then he was a doll as well right now, and to his new doll plastic hormones, she was incredibly hot, sitting on the side of the tub along with the little yellow plastic submarine their sister had left there. Smiling, she stood up and waved, doll sign language for *Hello, fellow demonically-possessed plastic doll. Us dolls have to stick together!*
Cody's vibrating head spun around with joy, realizing that the brat, in turning him into an action figure, had also turned him into another sort of supernatural creature.
Barbie waved again. *Keep jacking him off. I'll take care of him for you.*
She then stood up and walked jerkily over to their mom's razor, the one she kept in the shower. Popping the blade out, Barbie armed herself with it like a Klingon batlef, then leapt lithely to Matt's chest and slashed his throat.
It was a clean cut, just below the line of the warm water, and it turned red as a gout of blood washed out. Matt opened his eyes, screaming mid-orgasm as Cody continued to vibrate, then started to say something until Barbie swung her razorblade like Xena's chakrum and slashed his tongue in two.
More blood spurted out, and Matt passed out in shock, continuing to bleed as his head slumped into the water, drowning and shortly after that, dead.
Cody stood there, growing another quarter inch as Matt's cock ejaculated in his death throws.
Cody stopped vibrating, standing next to the wilting penis and looked at the blood-covered (but still incredibly hot) Barbie. He waved his arm. *How am I supposed to get my humanity back now?*
Barbie continued to smile. *You'll never have it back. The fool cursed you to be an action figure forever. Even if you made him orgasm until you regained your height and humanity, you'd revert to six-inch doll if ever a day went by where you didn't give him an orgasm. You're a doll forever, at your core." She smiled and her head spun around fetchingly. "But it's fun being a demon doll! And no one need ever find out!"
Barbie gestured to their mother's bath salts and scented candles. *Look, we have all the ingredients we need to raise this fool as your zombie slave, who'll do anything you desire.* She smiled still. *Even orgasm on command!"
This was more like it! Cody swam away from Matt's stiffening corpse, going with Barbie to light the candles and sprinkle the bath salts in various voudoun veve patterns. They carried one of the smaller candles to the tub and used it to drip hot wax on Matt's forehead, marking his with the sigil of Baron Samedi. Very soon, the new zombie stood up in the tub.
Cody then realized, however, that he had a problem in that he couldn't speak for the zombie to hear, but he had an idea and went to the drawer with dad's sex toys, including the cock ring with the packaging that had the phrases "LONGER ORGASMS!" on it. He tore the cardboard down to simply "ORGASM" then went and climbed the shower curtain with difficulty, jumping to the zombie Matt's shoulder, then shoving the makeshift cue card in front of his eyes.
On command, the zombie Matt rose to attention and ejaculated, and Cody felt himself grow another quarter inch.
Again. And again.
Cody felt himself growing, becoming larger with each orgasm until at last the life-size plastic manequin he'd become raised the card one last time and grew a final quarter inch as he transmuted back into flesh and bone.
Except at core he was still a demon doll. "Orgasm again," Cody said, his lips working once more, and his zombie brother did. Cody felt himself growing a quarter inch taller.
Sweet!
Cody grinned. "Orgasm fifty more times while you clean up the bathroom."
It was sweet revenge, watching the zombie Matt drain the bloody tub and scrub the voodoo ritual begrimed bathroom, orgasming all the while as punctuation while Cody grew over a foot taller.
At the end, he was well over seven feet tall, and had a zombie servant and a demon doll girlfriend.
Barbie smiled at him. *You'll have to go back to being a doll occasionally, you know. Otherwise, you'll have to keep growing a bit every day.*
"Of course, sugar," Cody laughed. "Anything you say."