Talk:House of Pendragon/@comment-124.182.184.174-20130802144232/@comment-5102537-20130802150634

He can't be. Morgause and Morgana were half-sisters already before anyone knew that Uther was Morgana's father. After they knew, they were still half-sisters. If Gorlois was Morgause's father, Gaius would have thought that M&M were full sisters (Vivienne = mother, Gorlois = father).

This means that Vivienne is the mother of both Morgana and Morgause and that she had at least three men: Morgause's father, Gorlois and Uther. Which also means that poor Gorlois has no biological child (at least neither Morgause nor Morgana) and that Morgause's father remains unknown.