In the Aesdaishar Palace, Edeyn swears loyalty to Lan as King of Malkier. Later she tells him that she plans to marry him to her daughter Iselle. She takes him to bed. (NS,Ch22)
NS,Ch22 - Edeyn still wears a white ki'sain indicating that she is a widow.
TEotW,Ch47 - She has the same married name as the late Cowin "Fairheart" Gemallan (with a slight spelling difference), a well loved Malkieri hero who was, in fact, a Darkfriend who betrayed Malkier to the Blight.