In the case of an inter-family marriages (i.e., such of that of a marriage of cousins), there would otherwise be two branches of descendants. DescendantSpaceTree only expands the desce_6.0_Wiki_Manual_-_Reports#Ancestral_Collapsible_Treendants descendants from such families in one branch, while the other branch is pruned. The choice is made by the setting of the '''''Branch to expand when duplicated''''' option. During report generation, the common ancestor of the two parents is found. The branch that contains the selected line (Patriarchal or Matriarchal) will be further expanded.