 The character's story arc began with Rosemary exacting revenge on her gold-digging daughter-in-law, Sadie King (Patsy Kensit), after she tried to fleece the Sinclair family by marrying the former's youngest son Alasdair (Ray Coulthard).Soon afterwards, Rosemary embarked on a romantic business partnership with Sadie's ex-father-in-law Tom King (Ken Farrington) that eventually led to the pair getting married on Christmas Day 2006 - which started out happily for Rosemary until Tom was suddenly murdered that night.The development of Tom's murder storyline, dubbed Who Killed Tom King?, saw Rosemary and her eldest son Grayson (Christopher Villiers) become enemies with Tom's second son Matthew (Matt Healy) - up to the point where she tried to incriminate Matthew and his two brothers, Jimmy (Nick Miles) and Carl (Tom Lister), for their father's murder by blackmailing local veterinarian Hari Prasad (John Nayagam) into getting himself and his fiancee Louise Appleton (Emily Symons) to conspire with their plot.