Alice Hirson portrays Mimsy, who is Robert Scott's widow, Anne's mother, Amy, Ashley and Robby's grandmother and John Juergens great-grandmother. She has the beginnings of Alzheimer's disease and recently moved to an assisted care home. It is stated that she likes everyone better than Anne, and Anne is reluctant to tell her about anything in her life, such as her marital problems with George as well as her pregnancy. Anne and Amy worry about her sometimes. Mimsy is reported as having suffered a slight stroke and therefore, Anne and George miss John's first birthday to go to her side. Mimsy surprises Anne and George with the news that she has remarried to a gentleman named Mr. Levy.