When a Master is born in the Patriarchy but is born alongside one or more sisters, what happens? What is the role of the mother once she has given birth to a Master member of the Elite? Do the sisters get trained alongside the new to-be Master? Are they treated as any other slave or given preference for being Elite even if they're diminished due to being born women? Does Master get to break these slave sisters of his or are they separated from birth? Is incest allowed or encouraged?
And what if the sister is older than the brother, could that mean she outranks him?