The Blues also kept their try-line intact by recording a 36-0 victory over the Ospreys. Sam Morris led the way with a hat-trick while Taylor Scurlock scored two tries and booted over three conversions, with Sophie Waugh completing the scoring with a try.
The Scarlets and Blues are now level on five points at the top of the table and will be looking for another win before they clash in the last round of fixtures.
This weekend the Blues entertain the Dragons while the Scarlets tackle the Blues. The concluding round will be staged at Aberavon Greenstars on Sunday 2nd February where the Ospreys take on the Dragons and Scarlets tackle the Blues.
The East v West Wales game will be staged at Aberavon Greenstars on Sunday 23rd February with a 10.30 kick-off.