I quite agree with you, Hollie. Although we can never know whether Catherine was married to Owen Tudor or not, I am not aware of any serious claims that she was not. The problem, rather, is that she married secretly, without the KIng's permission and that no documentation has survived to prove the marriage. As I mentioned above, were she not married when she discovered herself pregnant it is impossible to believe that she would not have married Owen as soon as possible. Since there were not any contemporaneous claims that the children were not legitimate, the King, therefore, would have no reason not to recognise his half-siblings, and so I don't understand why it would be seen as remarkable that he did so.

I also agree with you that she is a fascinating character (as is Henry VI, himself). The development of feminist historiography during the past 20 years or so has led to a very welcome re-examination of the lives of a range of Queens-consort and female aristocrats, illuminating the often subtle but important powers they exercised. (This is true also of southeast Asian history.)