Maci and Tory had not kept Neo a secret from the rest of the Underworld, through Maci's pregnancy nor after she was actually born. There was no use in even trying to hide her, since rumors had spread like wildfire even before an official announcement had been made - Maci and Tory ''did'' make an official announcement before Neo's birth, as half of those rumors involved speculation on who the father of the baby could possibly be. Tory didn't take kindly to that.