Edith abuses both her 3-year-old and 1-year-old daughters. her behavior is most likely related to a lack of

the answer is An early and secure attachment to her own parents.
Most people would most likely mimic their initial method of parenthood based on the treatment that they receive from their own parents.
If we experienced lack of early and secure attachment to our parents, we will most likely mimic the method of parentship to our Sons in the future. (which might cause the abuse)