AFfC 13: The Soiled Knight 208

Ser Arys Oakheart, who I'd forgotten about, was sent by Tyrion to look after Myrcella, who was sent by Tyrion to marry a Dornish prince for the purpose of uniting families. Possibly it was also to prevent Arys from beating Sansa too much at Joffrey's command. Anyway, it turns out Doran Martell thinks Myrcella is in danger from those who might want to precipitate a war with the Lannisters. So naturally Arys leaves her alone in the castle and goes off to fuck Doran's daughter. She then blatantly uses him for her own political schemes, namely trying to precipitate war by trying to put Myrcella on the Iron Throne. He's even more in thrall to his dick than Tyrion, this guy. I'm not sure vows of chastity are all that productive, to be honest.