Editor says, what if Arthur Prince of Wales had married the other fertile Sister Queen and lived? Please note that the opinions expressed in this post do not necessarily reflect the views of the author(s).
Editor says, in reality her sister Katherine married Arthur and after his death, his brother Henry VIII. Joanna's marriage to Philip the Handsome initiated the rule of the Habsburgs in Spain. However, throughout her long reign, she was under the regency of her husband, father, inquisitor, or son and she was long confined to a nunnery for reasons of mental illness that are (according to Wikipedia) disputed. Editorial comments are entered in [light green] typeface.