Thatto Heath-St Helens suffered defeat for the first time since 2015 as Bradford Bulls trumped their hosts 32-16 on Sunday.
Amy Hardcastle scored a hat-trick of tries in a stunning performance for the Bulls, with Jess Courtman, Lois Forsell and Debbie Smith also going over.
Claire Garner kicked four goals to add extra gloss to the scoreline on a memorable afternoon for the West Yorkshire side.
Thatto's three tries were scored by Faye Gaskin, Chantelle Crowl and Roxy Mura, Tara Stanley with two goals.
Elsewhere, Oulton Raidettes hosted Wakefield Trinity Ladies and the home side impressed to earn a 56-6 win.
Finally, Barrow Ladies welcomed Castleford Tigers Ladies and the travelling Tigers dominated throughout to earn a 62-6 win on the road.
By Rebecca Bird