Over the last five years, the number of women seeking help for gambling addiction has more than doubled in the UK, according to the charity GambleAware. As many women grapple with the stigma of addiction, the BBC has been given exclusive access to the first women's residential treatment centre for gambling, based in central England. In this film, Rachel Stonehouse explores the issues around women and gambling addiction, both in the UK and around the world, and asks why it is a secret for so many.