Royal had to win to keep alive their own title hopes and they took an early lead against the recent Isle Of Man FA Cup winners through Donna Shimmin but Maxine Smalley struck the all-important leveller before half time.
Corinthians, league winners last term, went second in the table with a 4-1 defeat of Douglas High School Old Boys. Jade Burden bagged a brace, Lisa Costain and Shannon Groves added one each, with Amy Beggs-Cairney netting a consolation.
Elsewehere, Gymns scored both goals at a winless Douglas Athletic.
