Bigger vagina

'I wonder...' Says Joanna, thinking out loud. 'Sure, why not go all out, or should I say in...'. With a snap of her fingers, Joanna begins to moan in ecstasy as her vagina gets larger forcing her to stand.
'Now for the fun part' says Joanna as she shoves her entire fist into her pussy. Starting to get into a rhythm, she adds her next hand. Soon, Joanna has both arms shoved deep inside of her.
'Now I wish there was a man big enough to fill me'. As if by magic, at that moment, Joanna hears her boyfriend walk in the door and begin to moan. Unknown to Joanna, at that moment, Aaron's dick was growing to the length of a baseball bat and the circumference of a basketball.
Running (or trying to) into the bedroom, Aaron screams, 'what did you...oh' seeing Joanna's state, Aaron realizes. At this moment, Joanna becomes aware that not only can she change her body, but she can also change other people's.