"The way your dick grew back gave me an idea" Karen starts staring at Jon's flaccid penis "gimmie the stone i wanna make this wish out of earshot so it comes as a surprise" she winks at Jon on the word "comes".
"Um.. okay" Jon says with only the slightest hesitation picking up the rock and passing it over to Karen "remember to add a timer so it isn't permanent."
"I know" Karen replies rolling her eyes and hefting her newly enhanced bust in Jon's direction before walking out of Jon's room and into the bathroom.
Karen makes sure the door is locked and then starts her wish.
"I wish that over this week my clitoris would slowly get bigger and bigger until it turns into a 6inch minimum fully working penis with matching balls that would last a month" Karen said her nipples erect and she wondered briefly if it was similar to what her penis would feel like at the end of the week before continuing with the wish "while this was happening to me i wish that Jon's penis would shrink until it was 2inches at most and that his balls would tighten and turn into a working vagina by the end of the week with a large clit cock" Karen grinned and then added quickly "i wish this also only lasted a month".
Karen exited the bathroom and walked back to Jon's room giving him the stone and kissing hi on the forehead.
"thanks babe!" She smiled at Jon.
"what did you wish for?" Jon asked uneasily.
"No! that would ruin the fun" Karen laughs and moved back to the door to exit Jon's bedroom, "i'm gonna go home, this one's a slow burn, ring me when you notice what's changing" Karen shuts the door and practically skips away home.