Always wear clothes that my sister doesn't want?

Let's just say the aesthetics are different. You and your sister 13 years old. The so-called three-year-old generation gap, your sister's clothes are not what you like, and people will not live long. In just a few decades, you can't compromise on major issues, but at least you want to be more free in the small matter of dressing up. Besides, you can't just wear clothes that your sister eliminated all your life. Why not work to earn money to buy clothes you like? Although my sister's clothes are very good, they must be more suitable and preferred by my sister. You want clothes that are more suitable and preferred by yourself.

Talk to your mother like this. Don't quarrel with your mother. Just be gentle and firm. Otherwise, if you quarrel with your mother directly, her mother may not understand you even more.