For some reason while I was playing my game Nany Landgraab asked my sim if she and her husband should have a baby and I said yes not thinking they would actually have another kid. Then later on she asked my sim again and again I said yes but this time Nancy was pregnant as an elder! Penelope is the older sister and Regina is the younger sister. I only added them to my library after the game gave them all their traits and aspirations since I wanted to see what they would get naturally. #Landgraab