The wish completed as Jon flashed and suddenly he physically was Jessica. All of the clothing and accessories needed to make him look like Jessica were gone, because he now was Jessica's doppelgänger.
The new Jessica walked over to Karyn with ease, and when she spoke, she sounded just like as the real Jessica.
"Karyn, what have you done, you turned me into my sister. I am speaking just like her, and with her voice, and I have her body."
To emphasize that he now was Jessica, he grabbed his actual breasts and felt them.
"But it is okay, it is only until the end of the wedding, Jessica."
Grabbing the stone, the new Jessica made a quick wish.
"Stone, I wish I knew how long I will be like this. Karyn, oh my gawd, do you know what you did, your wish has..."