I really need your help!?

Recently, I got caught stealing at Walmart. This was my first time and will be my last time stealing. It was mostly due to peer pressure and all that. Since I am 18 years old, the guy told me all I had to do was pay a fine, which would come in the mail. I decided to not to tell my parents since it was my problem and my responsibility. I learned my lesson and my plan was to pay the fine and not even tell my parents. I started a full time job and can not get the mail, so I asked my brother, which ended up revealing that he too got caught stealing from Walmart and since he is under 18 and had no ID, he has to go to court. Now that he knows, I know he will throw me underneath the bus and tell my parents. I am nervous and worried that I will break my parents' heart and disappoint them. All I am asking is, how should I tell my parents that both their children were caught stealing? Is there any easy way to do this? Or should I not even tell my parents and work it out with my brother?