Oh, she got a very raw deal. The irony is deliciousThe irony of Katherine (or since she's staying in Spain, Catalina) coming to the throne and begetting the future of the Spanish monarchy in this timeline by marrying a man who had already consummated marriages with her older sisters, compared to her chump OTL husband who tried to dump her by claiming he was cursed by marrying his brother's widow.
I always thought Catalina/Katherine got a raw deal.