Emily is a criminal. She was arrested for killing Ashley Webster in 2012.
At some point, Emily began to have on affair with her boss's husband, Alex Webster. When Emily starts to ask him for more, he convinces her that the only standing in their way of ending up together was some pretend prenup. This carried on for a while until Emily falls pregnant. Believing that Alex would be free to choose her once Ashley was out of the way, Emily poison her Tru to Colour Blonde hair dye with nicotine. She quickly confess to murdering Ashley when Catherine and Tess confronts her with the affair. Moments before she confess, she admits that she had a miscarriage.