If the earphone is broken by my sister, then we need to consider four factors, whether my sister did it on purpose and whether the earphone is expensive or not. Then we can construct a coordinate axis at one time, with the Y axis indicating intentional or unintentional, above 0 indicating intentional and below 0 indicating unintentional, and then use the X axis to indicate the price of headphones, with 0 on the left indicating cheap and 0 on the right indicating expensive. There are four situations in this situation: the earphone is cheap and unintentionally damaged, and the earphone is expensive and unintentionally damaged. Then we will analyze these four situations respectively.

The first case is that the earphone is cheap, and then your sister didn't break it on purpose. At this time, you can forgive your sister. After all, your sister is not mistaken, and headphones are not expensive. Besides, she is still your sister. Forgive your sister. You can leave a tolerant impression in your sister's heart.

The second case is that the earphone is expensive, and then your sister doesn't intend to break it. Because headphones are expensive, you may be angry, because you need a lot of money to buy another one, or spend a lot of money to repair it, but at this time, you must consider your sister's mood. She accidentally broke your earphone, and she was already scared. At this time, if you are angry with her again, it will undoubtedly leave a shadow in your sister's heart. Let's be tolerant. Expensive headphones can't compare with the affection between you and your sister. After all, she is your sister, right? Touch your sister's head and tell her that you are not angry, which will undoubtedly leave a good impression on her.

The third case is that the earphone is cheap, and your sister broke it on purpose. At this time, you should consider the reason. Why did she break your earphone on purpose? Have you two had any problems recently? So at this time, the focus of the problem is actually not the earphone, but the contradiction between you two, and the earphone is only the victim of the contradiction between you two, so at this time, think back whether you have done anything that makes your sister angry, and apologize to your sister if you have, and tell her that it is wrong to break other people's things, and what will happen if you are not my sister, so don't break other people's things casually, and you must actively resolve the contradiction between you and your sister.

The fourth situation is that the earphone is expensive, and your sister broke your earphone on purpose, so this time involves a problem. Does your sister know that headphones are expensive? If she doesn't know that they were broken on purpose, she is simply getting back at you. See the above situation for the solution. You can tell her how expensive this earphone is, and tell her not to break other people's things casually after that. At the same time, you should forgive her and let her feel your tolerance, which will help to resolve it. If your sister knows that this earphone is expensive and deliberately breaks it, then she is deliberately retaliating against you, which shows that you two have great contradictions. At this time, we must actively resolve contradictions. This problem needs your careful consideration in combination with your sister's situation.

This is my suggestion. I hope I can help you.