answer: #Person2# gets sick of Mary because she always tells #Person2# what to do. #Person1# thinks #Person2#'s being unfair to Mary.
documents: #Person1#: You seemed to be fed up with Mary.
  #Person2#: Yeah. I get sick of her. She always bends my ear about what she thinks.
  #Person1#: She is a barking dog. But she means well.
  #Person2#: But I don't like anyone who would drive me crazy by telling me what to do.
  #Person1#: You are unfair to her. She is a very nice girl.