Mugabe is accused of assaulting and injuring Gabriella Engels, a 20-year-old model who was visiting Mugabe's two sons, Robert Jnr and Chatunga, in a Johannesburg hotel a week ago.
Mugabe avoided going to court and was rescued when her husband, Robert Mugabe, the President of Zimbabwe, arrived in South Africa to attend a regional conference and arranged immunity for his wife.
Engels's case has been taken up by non-governmental organisation Afriforum, which says it will go to court for the injured woman over the immunity, and will also charge Mugabe in both criminal and civil cases.
President Mugabe and his wife left South Africa through its main military airport near the capital, Pretoria.
No mention of the case has been made on the TV and radio stations and daily newspapers Zimbabwe controls.