Talk:Gorlois/@comment-4260948-20130501233032/@comment-5674726-20130503005115

That would make sense, except that, even before Gaius knows that Morgana is Uther's daughter, he refers to Morgause as her half-sister. If Morgause was the daughter of Gorlois and Vivienne, Gaius would have believed that she and Morgana were full sisters.