Answer :
The mood for this is sad for this. She is talking about her mother being old and had lived a sad and fearful life. She feels as if its her fault her and is upset with herself and this saddens the mood.
The mood would reflect on it as crestfallen because he states, "I always thought of my mother as young, pale, rosy-cheeked and cheerful, peering shrewdly through her metal-rim glasses. Now she looked a little like an old woman. I had done that to her." He felt remorse as he described his mother. he believed he and the terrorists did that to her. Hope this helps you!