Dr Genchen Rugnath is charged along with his wife Ravina, Sandile Patrick Zweni, Nonduzo Dlamini, and Bhabha Dubazini.
They have all pleaded not guilty to 156 charges, including assault, rape, sexual exploitation of a child, and racketeering.
On Friday an 18-year-old woman, who may not be named, told the court that she gave birth to a baby four months after her 15th birthday and returned to prostitution three months later. She testified that her addiction to drugs supplied by Zweni kept her working, first at Victoria Lodge and then Inn Town Lodge -- the hotel Rugnath owned.
She admitted she was not being guarded by anyone and there was nothing physically to stop her running away.
"I was addicted to drugs. All I could think about was the drugs."