This is the man who hopes to be King of England. He has to marry a princess. He's not going to marry some beggarly widow from the camp of his enemy, who stood out on the road to plead with him to restore her dowry. If he marries an Englishwoman at all, she will be one of the great ladies of the Lancaster court, probably Warwick's daughter Isabel. He's not going to marry a girl whose own father fought against him. He's more likely to marry a great princess of Europe, an infanta from Spain, or a princesse from France. He has to marry to set himself more safely on the throne, to make alliances. He's not going to marry a pretty face for love. Lord Warwick would never allow it. And he is not such a fool as to go against his own interests.