It's good to want a child to get some rest.
Casey's daughter has an important exam tomorrow and wants to stay up until midnight to study.
Casey wants her daughter to do well on the exam.
Casey tells her daughter to get sleep and study in the morning.
Casey lets her daughter stay up and cram for the exam.
Casey's daughter feels refreshed and alert while taking the exam.
Casey's daughter is exhausted and can hardly think straight while taking the exam.