The Proteas women sealed another impressive series victory over Pakistan by winning the second T20I in Durban by 18 runs on Sunday.
The South Africans will take an unassailable 2-0 series into the final match of the tour when the two teams meet again on Wednesday.
The hosts were asked to bat first on Sunday but was rocked by the early wicket of Lizelle Lee, who only made six.
The Proteas struggled to up the run rate and lost two further big wickets when Marizanne Kapp and Laura Wolvaardt departed for 11 and 13 respectively.
Tamzin Brits, though, was impressive again with the bat and brought up her half-century before she was trapped in front for 66.
The Proteas only managed to post 133-5 in their allotted 2o overs but made a strong start with ball in hand.
Kapp and Shabnim Ismail picked up early wickets that left Pakistan tumbling at 20-4. Captain Aliya Riaz managed to add some runs to the total but the visitors were in trouble from the start with the required run rate.
Ismail finished with brilliant figures of 5-12 in her four overs as Pakistan only reached 115-7 in their innings.