Welcome to FeralHeart on your new account! ^^ Though I do recommend that your bother create a new account of his own. If he did something to break a rule or in any other related situation on YOUR account that you made, "you" will be the one who will look bad for their doing. It's also best because the staff aren't able to monitor everything that goes on behind your computer, so if he does do something of the sort, they wouldn't know exactly who did what. c: This is just something that happens and try to prevent it from ever happening~
Other than that, enjoy your new account and make memories!! ^^ Have fun!!