Sharing Our Innermost Thoughts

Me and my brother were alone at our home and a stranger came in and sat for a few sec and asked my brother if he could use the washroom… I was in my room so i didn’t knew all this and my idiot brother let him get inside the house both of us don’t know who he is! I am very scared now … Neither did our parents knew who he was and after he left the washroom was also unused… Like i felt strange… He could be a theif or someone wrong i could sense it might be he saw the situation that at this time there’s no one in our house… What should i do please suggest something… My parents shouted at us, which was valid… I am so scared what if he is a theif and comes back when our parents are not there😥😰