Jordan Nobbs came back to haunt her former club as Arsenal eased to comfortable double over Sunderland Ladies.
It was Carlton Fairweather side's seventh defeat of the season and leaves them six points above the drop zone.
Sunderland started brightly but Brooke Chaplen could not get to Beth Mead's first minute cross.
Danielle Carter got the better of Tori Williams in the home area, the Sunderland defender bringing her down, referee John Matthews pointing to the spot.
England midfielder Fara Williams saw her spot-kick beaten out by Rachael Laws but Victoria Losada followed up to bury the rebound high into the net.
But Nobbs then scored the goal of the game, combining superbly with Danielle van de Donk before beating Laws with a delightful finish off the outside of her right foot.
Sunderland youngster Madelaine Hill went inches wide but the better chances continue at the home end with Nobbs hitting the post and Casey Stoney shooting over.
The game though was over as a contest early in the second half.
Carter finished emphatically into Laws top left corner from Dominique Janssen's cross and Fara Williams buried a 53rd-minute penalty after Danielle Brown caught van de Donk.
Fairweather made a double change, bringing on Steph Roche and Charlotte Potts and Roche tried to play Mead through but the ball just eluded the striker.
Nobbs almost brought the curtain down on a virtuoso display with a last minute volley, which just cleared the bar.
Sunderland Ladies: Laws, Brown,Bannon, Sharp, T Williams, Holmes; Staniforth (McDougall 86), Furness (Potts 58), Hill, Chaplen, Mead.
Subs: Olsen, Beer, McDougall, Roche, Potts, Ramshaw, Kelly
Arsenal: van Veenendaal; Scott (Corredera 68), Stoney, Rose, Janssen; Nobbs, F Williams (Mitchell 61), Losada, Natalia, van de Donk (McCabe 73), Carter
Subs: Rogers, Dean, McCabe, Corredera, Wubbon-Moy, Oshoala, Mitchell
Goals: Losada 10; Nobbs 24, Carter 48, Williams pen 53
Booked: Natalia 41
Referee: John Matthews