Her ideas on domesticity and the "natural faculty for housewifery", as described in her book "Household Education" (1848), stemmed from her lack of nurture growing up. Although their relationship was better in adulthood, Harriet saw her mother as the antithesis of the warm and nurturing qualities which she knew to be necessary for girls at an early age. Her mother urged all her children to be well read, but at the same time opposed female pedantics "with a sharp eye for feminine propriety and good manners. Her daughters could never be seen in public with a pen in their hand". Despite this conservative approach to raising girls, Martineau was not the only academically successful daughter in the family; her sister Rachel ran her own Unitarian Academy with artist Hilary Bonham Carter as one of her students. Martineau's mother strictly enforced proper feminine behaviour, pushing her daughter to "hold a sewing needle" as well as the (hidden) pen.