According to ancient dream interpretation, you foresee something in your dream. Maybe your brother's family will encounter something. These things are related to their children to some extent, such as their children getting sick or breaking things at home while playing. These can be counted as one of them, so that they can pay more attention at ordinary times. The other is to predict your own disaster. Your own consciousness is shaken inadvertently, and filth takes advantage of it. In order to influence one's mood, one often appears as a familiar person in dreams, and then misleads in some places, which affects one's real life more or less.
Of course, it is best to believe in scientific theory.