PNS, who play a division above the Cobblers in the East Midlands League, got off to a flying start, despite Vicky Gallagher’s early penalty hitting the post.
With only 5 minutes played, Samara Iredale scored with a long distance free-kick and the lead was doubled a further 5 minutes on, as Cassie Steward slotted home past the Town keeper.
Peterborough also made a positive start to the second half, as 7 minutes in Katie Steward made it 3-0.
It was 4-0 on 77 minutes as Jodie Bartle sent the defence the wrong way and fired home.
Deep into added time, Stef Pepper and Gallagher combined for Georgia Coulson to make it 5-0 with the final kick of the game.
Northern Star are involved in more cup action next Sunday, 2nd April, when they face leaders Sheffield United in the East Midlands League Cup semi-final at Nettleham.
