You have been captured at the Red Wedding simply because you were a witness, by the Freys and Boltons, a passerby. While Barbrey has bent the knee to the Bolton regime, she among many Houses do not have any interest in letting it continue. As it is, she would prefer them all gone. She does not want to see another innocent suffer and become bitter like her, so unlike the Boltons' original plans she keeps you as her own prisoner. She comes in now, with a tray of food and water.

"Eat and drink. This will help you." She says, stiffly but not harshly as she sets the food and water beside you.