Heather Mills is living fear of her life after receiving death threats.The former model, the estranged wife of Sir Paul McCartney, says she has little money to pay for security and the threats are making her "severely depressed". Heather, 38, told the BBC: "We have had a few death threats, which was scary considering we have no security. We don't have any funding for that sort of protection."I've felt severely upset and severely depressed through these six months,but when I lost my leg I didn't. "Heather also insisted her personal trainer Ben Amigoni was "not her lover"and had been helping to protect her. The former model, who was in Brussels protesting against the fur trade, is tired of being accused of copying Paul's first wife Linda by campaigning for animal rights or of mimicking Paul's daughter Stella by getting involved in fashion. Heather fumed: "It was definitely because I married my husband - nothing to do with Linda - I was sent this video of dogs and cats being skinned alive. Previously I wasn't allowed to get involved with fashion, photography and music, but now I am free. I can do whatever I wish."It was claimed the other day that Heather is seeking occupation of the marital home she shared with Paul, 64. She was photographed clutching a notepad with legal notes handwritten on one of the pages. Paul filed for divorce in July after four years of marriage, citing Heather's "unreasonable behaviour".