Robert Baratheon successfully takes the throne from the Targaryens and makes his loyal friend, Ned Stark, Warden of the North. He then marries Cersei Lannister, a beauty from a powerful family seeking to make themselves kingmakers, and it is rumoured that their young sons (including the heir to the throne) are not Robert’s children but the product of incest between Cersei and her brother Jaime. When Robert dies unexpectedly, Ned rides south to become regent for the young prince despite opposition from the Lannisters. Ned then discovers that Robert and Cersei’s sons are not legitimate heirs. Cersei is a damn sight faster on the uptake, not to mention much more ruthless, than Elizabeth Woodville and has Ned arrested and executed (which is actually the fate of Edward and Richard’s brother, George of Clarence, when he spreads such rumours in our world).