✔ 最佳答案
Is your sister younger than you? If so, that may be why. But don't ever feel like your mom doesn't love you or she feels that your sister is better. Maybe is because your mom wants you to be more successful and productive in your life. Maybe she feels that doing chores will help you further in life when you grow up. I hope this helped! :)
P.S you should talk to your mom about this;.