Talk:Gorlois/@comment-5674726-20130807054837

''Morgause was the daughter of Vivienne and Gorlois. She was Morgana's half-sister. Morgause was smuggled out of Camelot at a very young age.''

It's not that simple with Morgause; since Gaius described her as Morgana's half-sister before he knew that Morgana was Uther's daughter, she was the daughter of Vivienne or Gorlois, not both. The balance of evidence on the show favours Vivienne as the shared parent.

That, or it was a writer error to have her described as Morgana's half-sister prior to The Crystal Cave.