'Thats it,' I thought, 'I'm going to show her.'
"Aunt Cathy, I wish You become a guy, my new brother!"
"What?" asked her. Then the transformation begun.
In few seconds, the young woman changed into a young guy 16 Y.O.
"What?"
She (now he) yelled again, this time in a unmistakably manly voice.
"How could you? I'm still your.. your.."
She tried to go on, but her old memories are gone, quickly replaced by new ones.
"..your older brother! So, don't joke anymore about our mom!"