The stone glowed granting Jon's wish. And in a blink, Steve was gone.
But something apparently went wrong, because Jon suddenly had the urge to enter his mom's bedroom instead. He opened the door and saw his mom (naked) on the bed. He could see all of her "new" tattoos clearly now. She smiled at him. But it wasn't the same warm motherly smile he was used to. This one was a devious smile. Like she was getting away with something really naughty.
"Come on, Jon," she said. "Get undressed so we can fuck."
Jon's eyes went wide as he realized what must have happened. He wished that Steve wouldn't be having sex with his mom. He expected the stone to just remove Steve from his house, but instead it replaced Steve ... with Jon! So now, Jon was going to be having sex with his mom.
This is sick! Jon thought, as he felt himself undressing, unable to stop himself. The stone's magic must have been compelling him. And speaking of the stone, when he began to undress, the stone fell out of his hand and tumbled under the bed, out of reach.
He looked up at his mom, who was still smiling at him, then back down at his almost naked body. He tried his best to stop what he was doing, but it was no use.
And soon, he was completely undressed and was approaching the bed.