看一下这篇英语短文~Tiffany's mom always gave her lots of money to buy

看一下这篇英语短文~
Tiffany's mom always gave her lots of money to buy the most fashionable clothes and favorite food.Her mom allowed her to do anything she liked.I really admired Tiffany.My mom didn't give me much pocket money and she always told me that I should behave myself.I was annoyed with her.
Whenever I didn't get what I wanted,I would complain to my mom,Tiffany's mom would give her that!I wish she were my mom."Every time,my morn would calmly say "Poor Tiffany".I couldn't understand her."She shouldn't be feeling sorry for Tiffany!" I thought."She should be feeling sorry for me."
One day,I couldn't help saying to Mom,"Poor Tiffany?Lucky Tiffany!She gets everything she wants!Why do you feel sorry for her?" I burst into tears.
My mom sat down next to me and said softly."Yes,I do feel sorry for her.I have been teaching you a lesson that she will never be taught."
I looked up at her."What are you talking about?" 这里为什么用look up？look out呢