When Jane entered the house, she saw Jon and Zoe in the living room. She was shocked to see that they had both changed.
Zoe wasn't goth, wearing a black T-shirt instead of a corset, and only having a couple piercings in each ear and no nose ring, but none of the other piercings or tattoos she had before. All of her black make-up was gone and she no longer wore a spiked collar. She didn't quite look wholesome, but she looked like a more normal teenager...
Apparently, the stone didn't just make them get along with each other. It changed Zoe so that they had more in common with each other, so then they would get along with each other.