User blog comment:Cillemaller the Witch/Is Gorlois Morgause´s father?/@comment-4999494-20120517171224/@comment-5106105-20120517191905

Yes, but they didn't know that in the first two seasons! And Gaius´s called Morgause Morgana´s halfsister in season 2... And he first found out that Uther was Morgana´s father in season 3. Why should he call Morgause Morgana´s halfsister, if he thought Morgana was Vivienne and Gorlois´s daughter and you say Morgause´s parrents are Gorlois and Vivenne?

I think that simple...But maybe it isn't... I can try to explain it in a better way... But I'm very bad at English :)