The Blue Bulls, Limpopo, Zimbabwe and Griquas also finished the week with victories, while the penultimate game, between Border and the Golden Lions, ended in 27-27 draw.
Griquas recorded their first win of the week when they beat the Border Invitational team by 12-5 in the opening game on Thursday, scoring two tries to one.
Free State failed to record a win when they were beaten 24-7 by the Limpopo Blue Bulls in the second game, as the team from the northern province scored four tries.
The match between Border and the Lions finished in a draw.
Zimbabwe, who will be playing the Junior Springbok Women next week, won their second game of the week by 25-5 against SWD, with Tanya Shava scoring a hat-trick of tries.
The Blue Bulls then built on their big win on Tuesday with a 12-10 victory over the Sharks, the difference between the teams a conversion by the Pretoria team's captain, Shiniqwa Lamprecht, who also scored one of her side's two tries.
The penultimate game was an even contest, with Border leading by 17-7 at the break before the Golden Lions fought back to secure a 27-27 with an unconverted try in the final minute of the clash.
The Blue Bulls finished the week with a close win over the Sharks.
Border centre Lilitha Vakalisa and Lions No 8 Lindokuhle Ngakane both scored two tries apiece.
Western Province underlined their class in the final match on Thursday, scoring three tries to one in their 21-5 victory over Eastern Province, after the team in blue and white hoops led by 14-5 at the break.
Final day results:
Western Province 21 Eastern Province 5
Border 27 Golden Lions 27
Blue Bulls 12 Sharks 10
SWD 5 Zimbabwe 25
Limpopo Blue Bulls 24 Free State 7
Griquas 12 Border Invitational 5
Images by Sabie Botha.
