Harry Potter and the Half-Blood Prince
After she was pregnant with the baby, she stopped giving him the potion and he left her. Soon afterwards, she goes to an orphanage and gives birth to Voldemort, naming him Tom Marvolo Riddle, and dies shortly afterwards. Voldemort is a very bad kid. He steals items from the other kids and uses magic against them. Dumbledore comes one night to tell him that he has magic and invites him to attend Hogwarts.