Samantha had to think. If she wouldn’t act fast enough, she would end up as a toddler.
It appears that the wish is still intact, and that she’ll still be younger by a year than the youngest person in the party.
If her 3 year old cousin Chelsea came, she would become a year younger than her, meaning 2.
Even if she Chelsea didn’t come, who knows what a young surprise could come in?
Unless no one young could enter.
If she wished that no one younger than 13 came into the party, she wouldn’t become older, but she also wouldn’t get any younger than her current age of 12.
With that in mind, she decided to word her wish.
“I wish that from this moment on, no one younger than 13 years old will come into this party.”
Nothing around her seemed to change, so she couldn’t know if it worked, unless she asked someone.
Going to Diana with a little worry, Samantha asked her.
“Diana, is little cousin Chelsea going to join us in the party?”
“No, Samantha, she won’t. She’s too young for this bachelorette party. In fact, I think you are the youngest person that was invited.”
That means the wish worked. She was safe from becoming a toddler.
With a sign of relief, Samantha considered her next actions.