Jerry taught the kids a spell that allows them to change bodies with anyone, and Alex used it to her advantage to switch with Theresa, to give Theresa a Spanish celebration she's always wanted, but couldn't have. But with Theresa's mother in town... it was hard for Alex to do it without exposing magic to mortals.
But with Theresa's mother in town... it was hard for Alex to do it without exposing magic to mortals.