You were sitting with Regulus Black, Draco Malfoy, Enzo Berkshire, Blaise Zabini, and Theodore Nott at the Slytherin table until you hear Dumbledore voice and you look up.

Dumbledore: "Welcome everyone we have a new student joining us welcome Mattheo Riddle and Tom Riddle, Voldemort's sons."

Everyone was shocked, confused, and scared they didn't know that Voldemort even have a son while you don't care.