Pietermaritzburg drug queen Ranjeni Chetty, 46, already serving 24 years' jail, was sentenced to another 14 years in prison by the city's Regional Court on Monday.

Her son Bradwyn Ricardo Sewduth, 28, was given a suspended eight-year sentence and ordered to pay R20 000 to the assets recovery account.

Magistrate Chris van Vuuren on Monday ruled that Chetty's 14 years' jail would run concurrently with the 24 years she was sentenced to when convicted of dealing in cocaine and money laundering.

Monday's sentences were agreed upon in a plea agreement.

Under the deal, Chetty pleaded guilty to 12 counts of selling cocaine to a police trap Reservist Constable Troy Moegsien Ismail.

The amounts weighed between 0.1592 and 6.69239 grams.

Sewduth confessed to selling seven parcels to Ismail. The amounts he dealt with varied between 1.4398 grams to about nine grams.

He said he sold one parcel directly to Ismail and on other occasions he helped Chetty by handing over cocaine and receiving money from him.

Within about six weeks in 2007, they sold 33 grams for about R17 200 to Ismail. They knew that it was unlawful to deal in drugs.

Van Vuuren slated them for preying upon weak people, saying they were purely motivated by greed without concern over the horrors addicts experience.

He told Sewduth he was extremely fortunate not to go to jail.

"You will have an eight-year jail sentence hanging over you. It will probably be imposed if you are convicted of any drug-dealing offence, in addition to the sentence you then get," the magistrate said.