Jon decided that the risk wasn't acceptable. Sure, while they were naked, they seemed like normal enough people. But he didn't know anything about them. He didn't want to enter their "lair" until he had a chance to find out more about them. And with the wishing stone, he could do just that.
"Maybe another time," Jon said.
The woman smiled. "That's okay. Our door is always open, so if you change you're mind ..."
I bet your door is always open, Jon thought to himself. He smiled and nodded. Then he turned around and went home.