After some thought, Jon decided to help out Zoe.
Holding the stone, Jon said "I wish that my parents accepted Zoe whatever way she wants to be." The stone glowed, causing Jon to look away. Then he listened in on his parents again.
He didn't hear them at all. He walked into the kitchen and they weren't there talking. He frowned, and fingered the stone. "I wish I knew what effect that wish had." The answer surprised him.