Karyn looked at Jon and felt helpless and frustrated that she couldn't help him. "Oh, I wish I could at least make you feel better." Her eyes went wide, when she realized what she had just done. "No, wait. I didn't ..." The stone glowed, causing her to look away.
When she looked back, Jon was gone. But, wait. No, there he was. He was bent over with his head between her legs. Karyn felt something. Something was definitely different.
"Get off me, Jon!" she yelled, pushing him away. She looked down in horror at the erect penis that was now between her legs. Jon paused for a moment, then he leaned in again, causing her new sex organ to move in and out of his vagina.
Karyn leaned back. She wanted it to stop, but at the same time, she didn't. It felt so good.
Then it occurred to her. Her wish was granted. Presumably, Jon was feeling just as good as her right now. So he was actually feeling better, as per her wish.
She looked down at the stone, still grasped in her hand. What was wrong with this thing? Then all thoughts about the stone disappeared, as her mind was overtaken by sexual pleasure.