Daughter of Leonard Charles and Evelyn Lorna Medlin, Meg was born and grew up in Adelaide, beginning her education at Croydon Primary School. Her parents encouraged her to read (with little success, she says in a personal communication) from a very young age, but it was not until her 20s that she discovered that reading was fun, and she says she hasn't stopped since. In the late 1980s she took up studying all aspects of writing, and achieved a Diploma of the Writing School in 1990. In late 1990 she won second place in the World Pater Awards for her radio play for teenagers, "Frog's Paradise", and this began her career as a playwright. At about this time Meg joined the SA Writers' Theatre, a group of professional playwrights who specialise in script development, where she served for several years on the Committee as Secretary and then Chairperson. She is also a member of the SA Writers' Centre, the Australian Society of Authors and the Australian Writers' Guild. Her husband Graham Roberts, whom she married in 1979, is an avid theatre lover and has supported her in all her playwriting pursuits in many ways including as actor, proofreader, lighting technician and set builder (although he has been heard to say after a particularly busy day, "Why don't you write books?").
Her short stories have also won recognition. In 1991 she won First Prize in the Australia-wide short story competition run by the Fellowship of Australian Writers, Manly Peninsula. She has had short stories read on Radio South Coast FM (1992) and Radio 5UV (1993) and has had a short story Highly Commended (Coolum and Interstate Writers' Group Short Story Competition, 1990) and Commended (Fellowship of Australian Writers, Hunter Region, 1992). Meg works full-time as an Office Administrator, and lately has been doing part-time studies in Accounting. As well as the books listed below she has published Simple Ideas for Healthy Eating (1991) and has had articles published in The Advertiser and in Nature and Health Magazine.
