Apparently Jenny still remembered the stone, because during Karyn's shock over what was happening, Jenny snatched the stone from Karyn and said to Stephanie "I wish you would become like me, then you'd have more tolerance around someone like me."
The stone glowed. Stephanie's looks changed slightly, but her clothes definitely became more slutty.
Karyn, again, was in shock. Now Stephanie was like Jenny. Except, there was no time limit for Stephanie. One of her best friends will stay like that forever. What was she going to do?