My sister

My sister let me go crazy!!
When will my little sister grow up and not just like a baby? She is already 10 years old. I think she already could control herself. But actually, she didn’t!
It is a nightmare.
Every time I went back home happily, but went back to school unhappily.
Every morning when I am sleeping. She will wake me up just because she want me bring her to buy candies and cookies. If I am not getting up on time, she will cry and yell so loud to wake me up. I always tell her she just eats the breakfast; her stomach has already full, there needs some time to digest the food. But she always told me that she is hungry again! Oh my god! I can’t believe that she could eat so many foods and never feel full. Every time I went back home I could notice that she was a little bit fat more again. I try to control her good appetite, but I have no idea.
It is really a difficult work for me.