User blog comment:Merlin919/Is Morgause, Vivienne and Gorlois's daughter/@comment-5139779-20120816022431

It's implied that Morgause is Vivienne's daughter and not Gorlois'. However if she is Gorlois' it would mean that she is not Morgana's sister. Furthermore I agree it should be changed. And lastly, perhaps Vivienne could be mentioned (or even appear ^-^) in Series 5 so hopefully we will get some answers.