Her brother had been unable to tell the emergency crew that had rescued him where he lived. He was deaf and no one had understood sign language. His hands had been shaking so bad from shock that he hadn't immediately been able to supply a number to call. He was uninjured and not a primary concern so he was left to himself until a translator came to see him. In the middle of all the chaos a translator had yet to be found. So he had remained alone and frightened until Maria and Steve had found him.Barton had waited in the helicopter that entire time. Hill had not wanted him to know about her brother. Steve could see why. Barton was an assassin, a skilled killer that had been compromised by the other side. If ever he was compromised again, her brother and family would make a perfect target if anyone wanted to attack the right hand of Nick Fury. So he was kept in the dark. Steve wondered why he was allowed to know. He was just as easily corruptible. He didn't ask her. He didn't want to remind her that he was just as dangerous as Barton.