Hell hath no fury like a mother lion scorned. At the death of her son Joffrey, she blames her brother Tyrion and attempts to have him killed. Upon the murder of her daughter Myrcella, she captures Ellaria and Tyene Sand only to slowly poison the latter to death while her mother watches on. And when Margaery Tyrell attempts to use the High Septon to manipulate Cersei's son King Tommen, she blows up both usurpers in the Sept of Baelor.