Maybe that's what Alice is waiting for - Ardent and Gavia heading back to town and get hit with the reality of their new life.
Nah, I think that Wildroses has hit the nail on the head. Alice is expecting complete and unquestioning obedience because, during her time in the Bubble, that's what she's got from the locals. Unfortunately, Ardent and Gavia don't have that level of complete awe for her that the locals have. Consequently, I think that they
will wander off and end up causing trouble with the friends that they will make. Alice will come storming over after they cause a major disruption (say, Gavia showing off her telekinesis in the way a RL teen girl would show off the apps on her cell or Ardent launching a song-and-dance number in the town square).
Alice will probably be shocked beyond words when Jack stands between her and them and tells her that he won't let her hurt his friends. I can see her splutter, go bright red and rage; when that doesn't work, she'll turn her back, close her eyes and then smile, just a little. That will be the moment in which the two kids shift in her mind from being prisoners that she's monitoring until the Praesides come to collect them to being two youngsters who are her charges and responsibility to raise to useful adulthood.
I can see (many moons from now) a panel where Alice is doing something 'big sister'-ish like braiding Gavia's hair for a town festival or something whilst Gavia chatters excitedly about something Miss Wheelwright showed her in an illustrated paper. I suspect that the Praesedes' plan is for them to learn what a family really is and how to live in a close-knit community. The next level up of 'why' will probably be revealed at a later date.