Sentence 1: Christa was with her aunt and cousins. 
 Sentence 3: She needed somewhere safe to leave the kids 
 Sentence 4:  Christa offered to take them into a movie 
 Sentence 5:  Christa's aunt agreed and they went to see a movie 
 Option 1: Christa stayed there and babysat while her aunt went to work. 
 Option 2: Suddenly, her aunt got called into work.