If there are several site managers on your family site, main site manager (site creator) can demote other site managers to the 'Site Member' status, please do the following:
1. Log in to your family site.
2. Move your mouse over the 'Home' tab and select 'Site Members'. Here you will see a list of all your site members. You can choose to view only the site managers.
3. Click on the ‘More’ link next to the member that you would like to demote from the 'Site Manager' status.
4. Use the 'Demote to member' option.