Recently during a conversation Alf mentioned his son, Duncan , Roo's younger brother . Duncan's mother Ailsa was a great character and the original diner owner . When Ailsa died of a heart attack, Duncan's behavior spiralled out of control. A teenager with no Mum , eventually he moved to USA to stay with Roo in 2005 . Alf did visit him in 2009 , when Duncan got married and he seems to be doing ok . Would be nice to see Duncan back in the Bay. He would be 26 now !!! Father and son together again !