I'm famous in a different country but nobody, even my parents, knows about it in my country.
How did that come to be?
I'm too shy to tell them. They would just not believe me anyway.
If you do not want to tell them, then you do not have to. It is your decision because it is your life.
Maybe I will try to tell them.
If you feel comfortable telling them, then go ahead. Sometimes fame can change other people, I understand the hesitancy.