When Mattie's mother sends her away, does Mattie do the right thing in leaving? Or should she have stayed to help care for her? Why do you think so?

Mrs. Cook considers sending Mattie to the country to live with some friends in case the fever becomes prevalent, but Mattie does not want to go. I think that Mrs. Cook is only trying to protect her daughter and that going away might be a better choice than staying and getting sick.