Heather Mills has accused estranged husband Sir Paul McCartney of being"physically violent". The court papers lodged by Heather's lawyers claim Paul once tried to choke her and attacked her while she was pregnant. Paul is also said to have used illegal drugs and drank excessively during their marriage, despite promising to quit.The former model says Paul subjected her to four violent attacks - including one where he stabbed her in the arm with a broken wine glass. He also allegedly forced her to cancel an essential operation because it clashed with holiday plans. In Los Angeles in November 2002, the court papers say Paul drunkenly grabbed Heather by the neck and pushed her over a coffee table. In May 2003, when Heather was four weeks pregnant, she alleges Paul became angry and pushed her into a bath, causing her "shock and distress". In August 2003, Heather asked Paul if he had been smoking marijuana. She says Paul yelled at her and then "grabbed her neck and started choking her".The court papers allege Paul, 64, hurled abuse at Heather and called her an"ungrateful b***h". He also allegedly refused to let her breast feed after their daughter Beatrice was born, saying: "They are my breasts. I don't want a mouthful of breast milk". Just days before the couple split, the 38-year-old claims Paul threw a bottle of red wine over her, then "lunged at her with the broken, sharp stem of the wine glass, which pierced her arm and left a scar". The papers say Heather - who lost a leg in a road accident in 1993 - was forced to crawl on her hands and knees up the steps of a plane because Paul had failed to make the necessary arrangements. Sir Paul's spokesman refused to comment on the allegations, but is said to be "shocked and devastated" by the claims and will contest them in their billion dollar divorce battle. A source told Britain's Daily Mirror newspaper: "He denies the claims completely and cannot believe he would ever be accused of such behaviour. He's absolutely furious. He only ever cared for her."