I think that the purpose of the story teller was to humanize the bad cop (Hank). She seemed to be her lover or concubine. I think that the director did not want us to see Hank just as an evil being but as a human.
I thought that the begging was strange specially because of the attitude of the wife towards the bandits that were following her. She was so fake and ridiculous demanding towards them. However, as u said I did focus my attention on Susan and Vargas after the incident with the bandits and I forgot about the car accident