As Morganna was playing with her new toy, Karyn approached Sarah and placed her hand on Sarah's. The two were now both touching the stone. Karyn leaned her head to Sarah's ear and said "I saw you take the wishing stone from Mistress Morganna."
Sarah made a stunned expression. "You know about the wishing stone?"
"Yes. I really wish you'd give it to me. I've had much more experience with it than you." Without realizing it, Karyn was already touching the stone, and therefore her wish was granted.
Sarah willingly gave Karyn the stone.
"We should still use it together, though," Karyn said to Sarah. "To further our cause."
Sarah agreed.
Their mistress and her newest slave approached them. "Karyn," Morganna said. "You shall appear as a Goth, as well."
"Yes, Mistress," Karyn said, as her clothes morphed and changed.