As Ty watched the water fountain outside, a young boy, 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.
Suddenly the boy stopped walking. He groaned as his cock began to expand! It began to grow longer and snake and coil around inside the boy’s underwear. It grew past 5 inches... 6... 7... 8... 9... 10... 11... 12... finally the boy’s cock stopped growing at an enormous 13 inch soft cock.
Then the boy moaned as his balls began to sag and grow, hanging down lower as they expanded from ping pong balls to golf balls to tennis balls to softballs and finally the size of large apples before they stopped.
When the growth finished, the boy had an enormous bulge in his shorts, but he walked off with no issues and without noticing. Ty almost laughed as he saw the head of the boy’s cock fall out of his shorts as he walked.