Maybe you could do it as outlined in the image below:
In the survey tab of your xlsform:
In the choices tab of your xlsform:
Data entry screen as seen in Enketo:
Reference xlsform:
Household (Index) Repeat Example.xlsx (28.8 KB)
Maybe you could do it as outlined in the image below:
Household (Index) Repeat Example.xlsx (28.8 KB)