"I wish that was me," he said. His eyes went wide, realizing what he had just done. The stone glowed and his vague wish was granted.
He blinked as it did so, and found himself looking up at Karyn from between her legs. "Don't stop now, babe," she said. Her hands were on the back of his head, and pushed down on his long blond hair to get his mouth between her legs.
Wait a sec! he thought, Long blond hair?!? He didn't have a chance to think about it, though, as his mouth met Karyn's lower lips. As he heard her moan when his mouth touched her, he tried to get his tongue busy keeping her making those noises.
As he did, though, he felt a hand touch his up-raised ass. What was that? he thought. Then he felt something else touching him a little lower. He tried to see what was happening, but Karyn had a grip on him that she wasn't letting go. He moaned as he felt that touch push into him. Unwittingly, he pulled his knees further apart. He moaned as he felt it push further and further into him.
God, that feels good, he thought. He tried to keep his tongue busy in Karyn. And she seemed to be enjoying it. "Oh yeah, Janey, just like that," she said.
His head jerked a little when he heard that, but then he felt a hand reaching around to stroke him between his legs. And that felt so good that it just blew all other thoughts out of his mind.
He felt himself being pushed into Karyn, and reflexively pulled back after, then pushed in again. His and Karyn's moans were completely in sync now, to the point that Jon himself couldn't tell them apart.
After a few minutes, Jon felt himself explode from the sensations, setting off both Karyn and the guy (Steve?) inside him.