Charli Aumiller scored her third goal of the season to break a 1-1 tie in the second half as Eastern edged Kingsway 2-1 in Woolwich, giving the Dragons their first loss after a 5-0-1 start.
Aubrie Lazzaro also scored for the Vikings (4-3-1), while Kaitlyn Roscioli and Callie Ferguson collected assists.
Meghan Shannon netted the lone Kingsway goal.