Please answer the following question: What is the alias of Gretchen's mother?  Answer the above question based on the context below:  Academy Award-winning star Margaret "Maggie" Elliot is a bankrupt actress of a certain age struggling to accept her new non-wealthy reality. She is in denial, and confident she can somehow build herself up again and re-launch her career to its earlier brilliance. After suffering another big disappointment while vainly striving to get that last one good role, she gets drunk, is arrested for DUI, and spends a night in jail. She is bailed out by Jim Johannsen, a younger former actor whom she had helped in the past. Jim, now comfortably settled as the owner of a boatyard, admits that he has loved her ever since those days and, helped by Margaret's daughter Gretchen, tries to help Margaret see that her big screen days as a famous actress are already over. She reluctantly tries to work as a saleswoman in an upscale department store, but overhearing some unkind gossip from two customers wounds her pride and she runs out.  Her old agent manages to get her a screen test for a role in a film she'd always wanted to play. She is offered and takes a screen test for a supporting role, believing that if she plays that character as a sexy younger woman -- rather than the middle-aged frump she is seen as by the studio -- she might be able to win the more coveted lead role. It does not work out.
A:
Maggie