Andy continued to look amazed, and then he saw William start shrinking! Only William wasn't changing...
Soon he was eye to eye with William. He'd grown two feet! William was starting to look like he did in college, with spiky hair, and his biceps bulged back to the wonderfully buff condition they were in when he played college baseball. Andy was thin as a reed and felt his baby face start to itch. He scratched and scratched at his face, and then his fingers started to feel stubble. What the hell!
He could feel the stubble forming from peach fuzz until it hardened, thickened into a nice five o clock shadow. His features, everything from his chin, to his arms, pecs, and legs, groaned within him. He felt excruciating pain for a few brief moments, and time started to mean nothing.
When he came to, he was panting, every muscle in his body taut and firm and....huge! He stood up, looking down on William.
"What do you think? Hey, my voice! I sound like my dad!"
"Looks like you ain't a squirt no more. Especially down here, huh?" William said, and patted Andy's now quite definitely huge and not adolescent bulge, which stuck out of his child's underwear quite unabashedly.
"Guess it's time for me to start wearing boxers, huh mister?"
"Please, call me William, Andy, call me William. I like your new body, that's for damn sure. You turned out to be way hotter than I thought. Before...well, god just look at you!" William's hand slipped around Andy's ass. Then, the Madame showed up.
"Aha, another success!"