The Daily Voice reported that the woman, 23, appeared on Thursday on charges of sexual grooming and sexual favours. The case was postponed to January 25.
Prosecutors claimed the woman lured her nieces, aged 10 and 3, from their Witsand home a month ago.
Their mother, who cannot be named, said a man was waiting at the bridge and paid R200 to touch the older child, while her small sister looked on.
"She (the sister) has been using tik (methamphetamine), it is the tik that makes them do such things. She worked on the road, sold her body," the mother told the newspaper.
The aunt was arrested last Tuesday. A male suspect was recently arrested.
