 Mercedes is left angry and disappointed when she walks in on Lindsey and Freddie kissing.When Mercedes discovers that Freddie killed Grace's father Fraser Black (Jesse Birdsall) for his mistreatment of his mother, Sandy Roscoe (Gillian Taylforth), she uses this information to blackmail him.She forms strong friendships with Cindy and Lindsey, whom she bonded with over Doctor Browning's death, and helps Cindy's daughter Holly Cunningham (Amanda Clapham) when she suspects Cindy has had a mental breakdown.