Dustin was having too much fun - here was a boy in the middle of the store with his shorts threatening to rip under his obscene bulge. The zipper of his shorts was straining, threatening to give way. But Dustin knew the clothes wouldn't rip - Ty's magic was allowing the shorts not to rip, but to stretch continuously.
And stretch they did as Dustin began to stare at the boy once more. The boy groaned from the pressure as his massive foot-long began to swell up even more. The boy's balls were swelling past the size of large apples, while his cock snaked longer and longer from his groin. But nothing ripped! Instead, the bubble in the front of the boy's shorts became more and more massive. Within half a minute, the boy had gone from looking like he'd shoved a softball down his shorts to looking like he was packing a basketball. Dustin's mouth just dropped open the more it grew.
By now the boy had to sit with his legs as far apart as they would go to make room for his massive package. The bubble just kept expanding outwards into his lap, further and further! It was beginning to look ridiculous. Dustin could physically watch the boy's cockhead slowly moving down his leg inside his shorts as it had started to grow out of his underwear. Finally, it emerged out into the open and just continued to grow ever longer. Dustin guessed the boy had close to two feet of cock... soft!
Finally Dustin broke his stare when the boy's cockhead almost drooped to the floor. When the boy finally stood up to move, his cock hung out of his shorts nearly to the floor! Dustin's mouth just dropped open as the boy walked through the store seemingly uncaring about the two foot long cock that was the thickness of a baseball bat hanging out of his shorts.