Jon realized that while Karyn had changed Jon's requirement to take orders from her, she hadn't changed Jon's requirement to behave himself. So, when she told him to behave, he did just that.
"Now," Karyn said in her new sqeaky voice. "Give me the stone."
Jon didn't do it (because he didn't have to obey Karyn anymore), but he also didn't protest about it either. He just stood there.
"Give me the stone, Jon!" she sqeaked.