The beauty of Beatrice's daughter, Ena, was known throughout Europe, and, despite her low rank, she was a desirable bride. Her chosen suitor was Alfonso XIII of Spain. However, the marriage caused controversy in Britain, since it required Ena to convert to Catholicism. This step was opposed by Beatrice's brother, Edward VII, and Spanish ultra-conservatives were against the King's marriage to a Protestant of low birth, as her father, Prince Henry, was the son of a morganatic marriage. Thus, they considered Ena to be only partly royal and thus unfit to be Queen of Spain. Nonetheless, the couple wed on 31 May 1906. The marriage began inauspiciously when an anarchist attempted to bomb them on their wedding day. Apparently close at first, the couple grew apart. Ena became unpopular in Spain and grew more so when it was discovered that her son, the heir to the throne, suffered from haemophilia. Alfonso held Beatrice responsible for having brought the disease to the Spanish royal house and turned bitterly against Ena.