“I have dreamed of giving up the crown. Take ship for the Free Cities with my horse and my hammer, spend my time warring and whoring, that’s what I was made for. The sellsword king, how the singers would love me. You know what stops me? The thought of Joffrey on the throne, with Cersei standing behind him whispering in his ear. My son. How could I have made a son like that, Ned?”

—Robert Baratheon 

References:

On The Table Podcast Episode 24: FAQ 1.3, Game Modes v1.2, and Free Folk Unit Overview; Lannister Heroes Box I stat cards reveal dicussion