She may be a grandmother at 80 years old — but one woman has worked in her restaurant for 50 years and said she is not thinking of slowing down at all. Guiliana Pierotti is a veteran of the restaurant scene in Glasgow, Scotland, according to SWNS — and she's worked in various kitchens since she moved there from Tuscany in 1965.Together with her husband, she opened Piccolo Mondo in Renfrew in 1974 and then launched a second branch in Glasgow in 2006. RETAILERS ANNOUNCE ‘INFLATION-FREE’ THANKSGIVING DINNER DEALSRecently turned 80 years old, she still works on a full-time schedule. "I'm 80 now,