Scott caught the medallion and he and Sally went to Scott's room. It was easy to see if the whole thing was the truth. "So what should we use it for, Sally?" he asked.
"Well that's easy," she responded with a grin. "It could just as easily have been you that dad changed into a girl instead of me. Why don't we change into each other. If it works, I'll get to find out what all the fuss is about the penis and it'll be your turn to be MY sister!"
"Uhh, well..."
"Oh, come on. Please? At the worst dad will have his laugh at our expense for believing such an outrageous story. Just think though if it's real! You'll have to spend a whopping 12 hours as a girl and then you can change back."
"Alright. If it works, we can see if dad notices too."
Sally rubbed her hands together and started getting undressed. Scott caught himself about to stop her, afterall she was his sister and he had no desire to see her naked. Not really. Well, why not? He started getting undressed too.