HBO's Game of Thrones is undoubtedly one of the biggest TV shows in history. The following pedigree chart shows the bastard sons of House Baratheon and House Lannister. As the pedigree chart below suggests, Jaime and Cersei are twins, and rumors abound about their close relationship. Tywin's wife, Joanna, died while giving birth to Tyrion—and Tywin loathes Tyrion as a result. At the same time, King Robert Baratheon has ruled Westeros since he and Ned Stark overthrew "The Mad King," Aerys Targaryen, roughly 15 years before the series' beginning. After the conflict, Robert married Cersei Lannister. Together, they have three children: the arrogant and cruel Joffrey, the kind Myrcella and the infant Tommen.