She appeared until 1989 and briefly appeared in 1993.
She returned yearly from 2001 until 2009, again from 2011 to 2013 and again from 2016 to 2017.
In June 1988, Morag returns to Summer Bay to attend Roo's wedding to Frank Morgan (Alex Papps) and soon learns that Roo is pregnant and Frank is not the father.She advises her to come clean to Frank about the baby's paternity and Ruth does so on the day of the wedding.Before she died, Frances had expressed her desire to once again become a permanent cast member.Morag has been described as an antagonistic, independent and cold character. She has been involved in storylines such as adopting out her illegitimate daughter Bobby Simpson, being widowed, helping her brother Alf Stewart through his many legal battles and a friendship with troubled teen Aden Jefferies.Frances said: "So I sort of adopt him in a way." She was also about to have a romance storyline.
Frances revealed; "there's another storyline which sees an ex-lover of mine come in as a detective".After Roo becomes a pariah, Morag lets her stay with her in the city but this does not last when Roo learns Morag is conspiring with Brett Macklin (Gerry Sont) to get Roo to sign over custody of their unborn child to him.Morag reappears for the funeral of her nephew, Alan Fisher (Simon Kay) and later enjoys sparring with Colleen Smart (Lyn Collingwood), a former schoolmate who constantly gets on her nerves. It is later revealed that Morag had a secret child with Donald and then put the child up for adoption. She is angry to find out Donald is her father, she is even more angry when she finds out Morag is her mother. She survives but is in a coma and Bobby decides to wait until she wakes up to tell her how much she hates her.In 2008 Morag becomes central to storylines with Aden Jefferies (Todd Lasance).Morag wants to know why he has problems because she had "taken a bit of a shine to him". Whilst interviewed by Digital Spy Frances stated: "There's lots of lovely dialogue that goes on between him and I - I take him under my wing and I find out what's wrong with him." He eventually looks up to her and moves in with her.Frances felt it perhaps not the best development because she enjoyed their "wonderful fights".