person A: i stole some money from my brother and he realized it was gone_comma_ but i haven't said anything. I think I should
person B: Yeah it might be a good idea to tell him. But you may want to have the money to give back to him first. 
person A: well I feel bad because I used it... on some drugs that I needed.
person B: Hopefully legal drugs.  But either way I think you should tell him and give him his money. But you know your brother better than me. 