 Following the revelation of her affair with Carl on her wedding day to Riley, Mercedes was at the centre of a kidnapping storyline when she was held against her will by Riley's serial killer grandfather, Silas Blissett (Jeff Rawle), before going into labour, giving birth to a boy as a result of the stress.Following her ordeal Mercedes briefly turned to prostitution.When Mitzeee (Rachel Shenton) grows close to Riley, Mercedes begins to stalk her.