When the Tenth Doctor caught her after her family tried to take his life essence, he trapped her inside every mirror in existence. He visited her once a year, every year. Her brother, Son of Mine, wondered if one day the Doctor would forgive her. (TV: The Family of Blood) The Tenth Doctor later mentioned "a girl with a red balloon", saying that the Mortal Mirror wasn't a real mirror or she would be inside it. (PROSE: Martha in the Mirror)