Melvine Malard opened the scoring after 23 minutes, heading home Geyse's cross from close range.
The Reds were dominant in possession but the score line remained close until the 77th minute before the floodgates began to open.
Rachel Williams grabbed a hat-trick with further goals from Celin Bizet (two) and Ella Toone ensuring an extensive victory for United.
FIRST HALF The Reds launched wave after wave of attacks soon after as we tried to break down the visitors whose resistance was proving tough to break down.
The first opportunity fell to Malard within the opening three minutes but her header lacked the power to challenge Albion's keeper.