Am I someone's keeper?

I think of myself as my cousins keeper. I have watched her grow up and I have made a great effort to make sure she doesn't get into any trouble. If I find out she has does something bad I will call her and talk about it with her. I tell her why it is wrong and why she shouldn't do it again and what could happen next time and all of that kind of stuff. She usually cooperates and says she is sorry. She is a really good kid though so she usually doesn't do bad thing, and if she does I'm usually the first person she talks to about it. In a way I do think of being her keeper.