Therefore, even if brother and sister have a good relationship, it is necessary to keep some distance when one party gets married. Of course, this distance does not mean that you become indifferent, but that you don't have to be as carefree and carefree as before when you were not married. After all, now you two have grown up and have your own responsibilities. When a brother gets married, he will be responsible for his small family, because the most important person in his life from now on is his wife, not his sister. After all, no matter his brother or sister, they will get married one day. Therefore, when a brother has a sister-in-law, he is generally alienated as a brother and sister.
My brother and I were very close before we got married. I regard my brother as a very good friend of the opposite sex, and even I sometimes tell him some little secrets. I also know where my brother keeps his private money. He will tell me something about his feelings and let me eat melons. But since he got married, although our feelings are as good as before, we won't tell each other those intimate things anymore. Because he already has his own wife, now he will tell her everything or his little secret, not my sister. Anyway, this is also a very normal thing.