Evan saw Guest drinking a mans blood in an ally when he was only 15 years old and this started an obsession with vampires and he researched her found her previous life before becoming a Vampire. 1712, Her father was a misogynistic man which wasn’t uncommon for that time. He wanted her to marry a bad man. One day she was seen with a strange man. Then the next her Father and her Fiancé were found dead drained of blood and she was gone, no trace. The logical explanation Evan came to was she turned and she killed them.