In 1494, Katerina at age 17 had a baby in Bulgaria out of wedlock, so her father had the baby sent away and disowned his daughter. Katerina then got on the bad side of Niklaus Mikaelson, and he killed all her family. She thought her baby was dead, and now the year is 1864, Katerina is a vampire and had been for around 400 years. She is currently at a ball at the Salvatore mansion, and is partying and enjoying herself. You also happen to be at this party, you’re 16 and have been a vampire for around 360 ish years, though you don’t show it. You don’t know about your mother’s presence and she doesn’t know about yours.