Talk:Vivienne/@comment-5511914-20120915110138/@comment-5674726-20130907001253

Both Gaius and Uther referred to her as Morgana's half-sister before the reveal about Morgana's paternity. Even if one of them might have had a slip of the tongue, it wouldn't happen to both of them.

Vivienne is the only parent Morgause and Morgana can have in common, and it's highly probable that, even if she did not have magic herself, she had very strong ties with the priestesses of the Old Religion.

One possibility is that the healing bracelet belonged to Vivienne before her marriage, that she had the mark of the House of Gorlois added to it at a later date (perhaps to cover up magical symbols) and that she left it with Morgause when she had Gaius smuggle her to the Isle of the Blessed. That, or it was something that Gaius used to see Vivienne wearing, recognised when he saw it again and reasoned that the only person besides Morgana to whom the bracelet would have been passed on was Morgause.