Feminists who exploited the death of Sylvia Plath to accuse her husband, English poet Ted Hughes, of mistreating her committed an "abuse" and a "horrible form of theft", the couple's daughter has said. Frieda Hughes said she had been "appalled" by the appropriation of the tragedy to suit a cause.In a BBC documentary, Ted Hughes: Stronger Than Death , poet Hughes said she deplored the judgment of "outsiders" who mistakenly believed they had an insight into her family's life.Hughes was two years old when her mother committed suicide in 1963, at the age of 30.Her father went on to have a relationship with his mistress, Assia Wevill, who killed herself and their child six years later.The suicides were taken up by feminists, who accused Plath's husband of mistreating both women.Speaking in the documentary, Hughes said the links made between the two deaths were a form of abuse in themselves."I was appalled that something that happened in 1963 could be carried forward," she said."For outsiders to make judgments that affect somebody in their life, for all of their life, is a sort of horrible form of theft. It's an abuse."It is the first time Hughes has co-operated with programme-makers about her parents' lives. ..