Holders Hibernian progressed to the semi-finals of the Henson Scottish Cup after beating Spartans 3-1, with Claire Emslie bagging a double.
Glasgow City also won their quarter-final, netting four times to Forfar's solitary goal.
Hibs and City will be joined in the draw by Celtic and Celtic Reserves.
Celtic Reserves' Ainsley Douglas claimed the only goal to oust Raith Rovers while the senior side overcame a battling Toryglen side 4-3.
Toryglen's exit and Celtic Reserves' victory means the latter become the only First Division side left in the competition.
Glasgow City 4-1 Forfar, Hibernian 3-1 Spartans, Celtic Reserves 1-0 Raith Rovers, Celtic 4-3 Toryglen