(Riddle, OR)  --  A woman and her son are the latest victims of a deadly house fire in Douglas County.  Officials say 38-year-old Tabitha Howell and 13-year-old Andrew Hall-Young died yesterday evening in a Portland hospital as a result of the Wednesday blaze in the community of Riddle.  Four children died at the scene that day.  Officials say 39-year-old James Howell is still in critical condition.