Cersei Lannister
From Asoiaf
Queen Cersei of House Lannister is the daughter of Tywin Lannister, Lord of Casterly Rock and [[Lady Joanna]. Ser Jaime is her twin brother. She is married to Robert I of House Baratheon, King of the Seven Kingdoms. They have three children, Prince Joffrey, Princess Myrcella and Prince Tommen.
Her mother died in childbed.