As Ty watched the water fountain outside, a young boy who was probably about 13 walked up to the fountain. He turned it on and bent down, taking a few big gulps of the water. Standing up, he began to walk away when he felt a tingle in his genitals...
“Uhhhhmmm” the boy moaned softly, as the tightness in his jock increased and his shorts began to feel a little tighter in the front. His cock had only been 4 inches long in its soft state at first, but the water had stretched it out to 6 inches. It was now reaching the 7 inch mark while the boy’s balls had reached the size of golf balls.
“Ohhhhh….” The boy groaned, as his clothes began to feel really tight and the boy began showing a bulge in front of his shorts just as the growth petered out. The boy's 7 inch cock made a noticeable bulge in his tighter underwear and shorts, and his balls were also much improved.
Now annoyed by the tightness of his underwear, the boy looked around to make sure no one was looking, then grabbed his cock through his shorts to try and rearrange it. Eventually he settled for letting it hang down one of his shorts legs and letting his balls fill his underwear.
Half just to be humorous and half because he was curious how far this would go, Ty wished for the boy to become incredibly thirsty again. Immediately the boy stopped and doubled back to the water fountain. Crouching down once again, he took several big gulps of the water this time before standing up slowly.
As he turned around, Ty could already see his cock beginning to swell again. The boy moaned as his balls began to sag and grow, hanging down lower as they expanded from golf balls to tennis balls and finally the size of softballs before they stopped. It looked absolutely ridiculous on the boy, who was groaning from the extreme tightness of his stretched out underwear.
His shaft, meanwhile, had already passed 10 inches long and was close to growing out of the leg of his shorts! In fact as Ty watched, it did just that, peeking out at first with just the tip, but quickly growing until the whole head hung out easily. It had to be over a foot in length!