CerseiLannister

Cersei is the only daughter of Tywin Lannister, Hand of the King and the richest man in the Seven Kingdoms. Even before she was married off to Robert Baratheon, she was involved in an incestuous relationship with her twin Jaime, the only sibling she cares for. With her son Joffrey now king, she is taking advantage of her position as Queen Regent.
"Love is a weakness.
Love no one but your children." — Cersei Baratheon