As if Jon wasn't nervous already thinking about the possibiltes of Zoe having complete control over him, she then adds a similar wish to have complete control over Karyn as well.
Just to show her control, she says, "Have the two of you ever seen the movie 'Ella Enchanted'? Well, if you didn't, you could look here - http://www.imdb.com/title/tt0327679/ - but that is besides the point. I want the two of you to obey any command that you are given for the next three days - except those that you give each other."
Jon and Karyn knew that they were screwed royally with this new wish, but they were hoping to be able to hide out for the next few days.
Zoe was not about to give them that chance. As she was about the leave, she says, "the two of you will not miss a day of school for the rest of the week. And just so that you have as much fun as possible, you will spend no more than 10 hours in either of your houses each day for the rest of the week. Ta!"
Zoe leaves the room and Jon and Karyn ask each other, "now what?"