answer: Julia refuses #Person1#'s party invitation because her mother wants her to go home early.
documents: #Person1#: Hello, Julia, I know a party that will begin at midnight. Would you love to go?
  #Person2#: I'd love to, but my mother asks me to go home before 11:00 every night. She will worry if I get home late.
  #Person1#: What a pity! The party is very interesting.
  #Person2#: I have no choice. My mother is always very strict with me.
  #Person1#: Don't complain about it. She is concerned about your safety.
  #Person2#: You're right. Mother's love is the greatest love in the world.