Being betrothed means she wears the insignia of betrothal: engagement rings and all the gifts Pilatus has given her—jewels, earrings, necklaces, and the pendants.
Robert waved an impatient hand. " Old enough for betrothal. The marriage can wait a few years. " The king smiled. " Now stand up and say yes, curse you. "
" Yes, " said Reznak, " and afterward there is a special cake. A women's cake, baked only for betrothals. Men are not allowed to taste it. I am told it is delicious. Magical" .
" At once" ? Edmure sounded so unhappy that Catelyn had the unworthy thought that perhaps he had been entertaining notions of breaking the betrothal after the fighting was done.