Heather Mills posed for explicit full frontal shots during her days as a'glamor model'.The former model - who is currently embroiled in a bitter divorce battledwith estranged husband Sir Paul McCartney - is seen provocatively lying withher legs open, flaunting her private parts, in the shots taken for anx-rated magazine.Heather, who has previously denied stories she was a porn star during herearly modelling day, squeezed herself into a red lace corset - pulled downto expose her breasts - and matching red stockings.In another shot, she raunchily poses knickerless on a white quilted bedwhile cupping her naked breasts.A source close to Paul - who has a four-year-old daughter, Beatrice, withHeather - told Britain's News of the World newspaper: "Paul has tried togive Heather the benefit of the doubt for the sake of Beatrice. Now thesepictures have surfaced, it's impossible."Last year, lurid shots were released of Heather in a 1988 German sex book,'Die Freuden Der Liebe (The Joys Of Love)', which featured naked images ofher performing a sexual act on a male porn model.She claimed the book was a "sex educational manual".Last month, Heather appeared on UK TV show 'GMTV', slamming the press formaking up lies about her past.She said: "They eliminate the whole 20 years of my life of campaigning andput in things like 'hardcore porn queen'."It was just glamor modelling."