Pompey Ladies beat Swindon for the second time in eight days, courtesy of a 3-0 victory at Cinder Lane.
But they had to remain patient before eventually securing the points, with all of the goals arriving in the final 22 minutes.
The hosts were sitting bottom of the table and without a point to their name, but made life tough for the Blues by getting plenty of players behind the ball.
It was one-way traffic throughout the first half, with Shannon Albuery and Daisy McLachlan looking particularly threatening.
Pompey’s total dominance continued unabated after the break and the deluge of pressure finally paid off.
Daisy McLachlan picked the ball up on the left and found room to fire a shot into the bottom corner of the net.
She was involved again when the lead was doubled on 80 minutes, feeding Sammy Quayle to lay the ball off for Katie James, who hammered it home.
And Quayle wrapped things up late on, latching on to an incisive pass from Ellie Kirby and slotting into the net.
Blues boss Jay Sadler said: “I was proud of the whole team – players and staff. We showed passion, desire and togetherness – everything that epitomises this fantastic club.”
Pompey: Levett; Kirby, Southgate, Currie, Peck (Quayle 62); Sievwright; Panting, James, Boswell (c), McLachlan; Albuery