Sentence 1: Lacy had two children. 
 Sentence 3: When one was about to sleep, the other's noises would keep them up 
 Sentence 4:  Lacy decided she needed some quiet time 
 Sentence 5:  She drove them around until they were both sound asleep 
 Option 1: She lived in the city and didn't drive. 
 Option 2: It was nearly impossible to get them to sleep.