The contradiction between sister and brother-in-law

According to common sense, there is nothing wrong with this brother's approach, but for such an environment, my sister may need help, but after all, she is married, and the person who wants to take care of her life is her own husband, who wants to live with her for a lifetime, not her brother; As a brother, I think you did a good job. You don't have to blame yourself, but your brother-in-law should think about how to deal with such a thing. As a brother, you should do it, but sometimes perseverance is not a good thing, because you have to have your own family and your own lover to take care of; As your sister, don't you think about it? You already have a family. Your brother may help you for a while, but he can't help you for a lifetime, can he?