There was a flash of light and Jon could feel his clothing changing. After the light faded and Jon could see again he saw himself in the mirror wearing a pink dress with lots of frills, with matching pink ribbons in his hair. He lifted up the skirt of the dress and noticed he was wearing a light pink diaper.
Jon realized that he hadn't thought his whole wish through, this would be sexually exciting, but it would still be very weird. Not only would he would be wearing girl's clothes, he would be wearing baby girl's clothes, complete with diapers. He decided since he couldn't reverse it he would just have to roll with it. Everyone else saw it as normal anyways.