Dustin backed up a little bit, away from Matt, his big old dad. Of course he'd never thought Ty was the only one with powers That was because he'd never thought about it. He'd been so wrapped up in his own circumstances he had just...never thought about it. Well, it was time to start thinking about it now, because, like it or not (he kind of liked it), someone else with powers was changing him, too. He looked down at his hand and saw the hair there thickening, becoming more like Matt's. He also felt his erection becoming larger and harder than it ever had.
"So, how do /you/ do it?," he asked, turning his thoughts to the present. "Ty makes a wish and it happens. Is that what you do?"
"No, not exactly," Matt replied with a good-natured chuckle. "My ma, - I guess she'd be your grandma, now - she passed on her powers to me. Hers came through cooking, same as me. That's how I got this way. And how you will, too."
Dustin could tell he was growing taller. And wider. And fatter. He was growing all over the place, even his dick! His clothes were tearing, unable to constrain his expanding body. His hairy gut swelled out of his shirt to close the distance between him and his dad. His pants tore and his boxers soon after leaving his throbbing pole to get some air. His feet even broke right out of his size fourteen shoes.
All of sudden he felt and heard a rumble coming from the bottom of his gut. It kept building and building until finally, release - "BUUUUUUUUUUUURRRRRRRRRRRRRRRRRRRPPPP!!!!" Dustin let out a tremendous belch, enough to shake the windows.
"There, now, it's all done," Matt declared, grinning wide like the proud father he was. "And it went better than I expected. There must have been something to do with the mingling of the magic." Matt let out a deep belly laugh and clapped his new - and improved - son on the back.