My sister and I are both married, but my mother is partial to my sister and treats her children better than mine. Whenever I speak, they contradict me, and I fall out with them.

In fact, when you were young, didn't you love your sister as much as your mother? It's just that we've all grown up. With your own family, your role has changed and you care more. It's normal for your mother to think this way. If you have two children, you may understand your parents' intentions. Besides, the old people are younger than we are now. We don't understand their ideas, but we should be tolerant and be ourselves. Besides, no one likes it. If you reflect on your own reasons, or find someone else's reasons, it is not a good solution and you can only fall into extremes. In addition, it is best not to let outsiders participate in family affairs.