League leaders Arsenal had hoped to clinch the title following a 4-1 home win over Liverpool earlier in the day.
However Blues' win at Doncaster, courtesy of a goal each for Eni Aluko and Jade Moore, means that David Parker's side can still finish level on points with the Gunners.
Blues have a trip to Bristol Academy and a home fixture with Arsenal left in the FA WSL.
But next up is the UEFA Women's Champions League round of 32 home leg against Verona at the DCS Stadium on Wednesday (26 September, 2pm). Tickets cost £6 for adults and £3 for concessions.