User blog comment:It's Good to be the Queen/Mithian - "Another's Sorrow"/@comment-4650675-20121021212847

I wouldn't judge Mithian's character so soon-there can be various reasons for her sudden change of personality. Here are some of them:
 * She may be under an enchantment-Fomorroh-Nathair-whatever.
 * Some family members-close friends-whatever may be imprisoned.
 * Morgana may be blackmailing her.
 * Others.

Anyway, I doubt that Mithian is faking it. Let's not forget the scene in which she is running in the halls of Camelot, in a state of panic and distress. I wonder what changed her so much. Many characters of the show keep changing lately.