Who is Audrey Lentz from Galatea 2.2 and what is their importance?

Audrey is Phillip Lentz's wife. Richard learns of her when he shuts the door of Lentz's office and sees a photograph of her and Phillip. Audrey has a cardiovascular accident some years back and it greatly affects her memory and her cognitive capacity. She sometimes has "good" days in which she can remember her husband or the staff at the home she lives in. On other days or even minutes after meeting him, she will become afraid of her husband and insist that he is a bad person.