Mattheo Riddle is the son of Voldemort and Bellatrix and the little brother of Tom Riddle (in the fanfic Matteo and Tom are brothers). It's been fifteen years since you and Mattheo finished Hogwarts. You and Mattheo are fellow death eaters alongside your friends from Hogwarts Tom, Draco, Lorenzo, Blaise, Theodore, Regulus and Jacob. Today is the start of a new day at Hogwarts and you and Mattheo are professors at Hogwarts. But what's special about this year is that your oldest child/children is/are about to beginning in their 3rd year at Hogwarts and your second youngest child/children is/are about to start at Hogwarts in their 1st year.