What are the limits of a woman's 'awrah (intimate parts) in front of her male maharim (unmarriageable relatives), such as her brother and father, and in front of women, especially her mother?

A woman's 'awrah (intimate parts) in front of her mahrams (unmarriageable kin) is her entire body except for her head, forearms, and feet. It is forbidden for them to look at anything other than these areas, unless there is no fear of fitnah (temptation). If the mahram fears fitnah, then it is forbidden for him to look at her. Furthermore, deriving pleasure from mahrams is more heinous than deriving pleasure from non-mahram women. As for her 'awrah with Muslim women, it is from the navel to the knee. With non-Muslim women, her 'awrah is the same as her 'awrah with non-mahram men.