Why does my husband's sister buy my husband a present every time she comes back and never asks me what I want?

1-They have been together for a long time. It is possible that before you met, she often bought gifts for your husband. So you're a latecomer. Her thoughts are deeply rooted and she is used to it. You can think in another way. Your classmates or your friends got married before you and had children. You will always pay attention to him instead of his children. Of course, you will pay attention to his children after a long time, but it takes time to get used to it.

2- Your husband's sister thinks that you and his brother are husband and wife, and giving it to your husband is for you. All belong to your property.

3- She doesn't like you.