Jon realized his mistake, but he realized it too late. He had only meant to make it a little less disgusting to have his mother's pussy, by making it younger... only he had made it younger by wishing it was from before he was born.
Of course, his mother's pussy is where he was born from. Before he was born, she was pregnant with him.
Jon's belly had expanded and it suddenly felt very full. He wasn't sure whether the motion he felt inside it was real, but it was obvious that he was very pregnant. He could give birth any day now. And he knew just what the baby would look like, since he'd seen his own baby pictures. (Or did he? The magic made it normal for Jon to have a pussy. Then he would have been born with a pussy. Then the baby might be born with one....)
Jon slowly turned over the stone while thinking. What could he do?
