People need to be sorted separately as a spouse and a child.

Use case(s):The same person could be the 1st spouse of someone, but the 5th child of their parents. In this case,

{{#genealogy: person | sort_index=5 }}

works to sort them among their siblings. But something like

{{#genealogy:partner|John Smith|sort_index=1}}

is needed to sort them as the first wife of John Smith.