Mo moves to Albert Square in September 1988 to be near Frank and his family. She disapproves of the way Frank is raising his teenage children Ricky (Sid Owen) and Diane (Sophie Lawrence) and immediately clashes with his fiancée Pat Wicks (Pam St. Clement), bringing up her past reputation as a prostitute and threatening to put a halt to their impending marriage. During her time in Walford Mo has an array of jobs; she first works in the kitchens of The Queen Victoria, then on Arthur Fowler's (Bill Treacher) fruit and veg stall and then in Ali Osman's (Nejdet Salih) café. However all her jobs come to an end due to her interference, causing her employers no end of grief.