"I wish you would do as I say," Karyn said while holding the rock. "Hold still."
Jon's limbs immediately became immobile. He could breath, move his eyes, and blink, but that was basically it. As he stopped moving, he became more aware of his body. It felt like his blood was on fire. His breasts were continually pushing out, causing his skin to stretch painfully. His bones were creaking and shrinking, which was represented by his clothes no longer fitting.
All the pain only made him want the milk more, so he could have those few moments of bliss. His gaze was fixed on Karyn, on her breasts, wanting more milk.
"Now, what to do," Karyn said. "It seems like your wish made you . . . Ah! Not again." Karyn's breasts be gain to swell again due to Jon wanting more milk. She might have told him to hold still, but that did nothing to stop him wanting more. Karyn emptied her breasts once again and put the jar tauntingly in front of Jon. She smiled smugly, knowing he couldn't move; probably punishment for the painful experience of having her breasts grow.
Having the milk in front of him, but not able to drink it was making him go crazy. More. More. He wanted more.