Who is Carla Jean Moss from No Country for Old Men and what is their importance?

Carla Jean is Llewelyn's wife. She is younger than he is but knows her mind and believes that he is that one special someone for her. She met him while she was working at Walmart at the age of sixteen. To Carla Jean, there was never any question. They've been married for three years. The money Moss brought home took away the life that she had with him. When he calls her from the hospital, she begs him to just give the money back so that they can go back to the way that they were. It is all she wants.