Thinking about authorisation ("we know who you are, we're trying to decide if you can do the thing you want to do").
We've got resources to protect - routes that should only work for, and parts of pages that should only display for authorised people.
We've got a list of users (two people is a list!). We can assign arbitrary properties to people including 'roles'. (Roles are magic strings)
I know I should think in terms of "0, 1, lots", but I'm pretty confident that it really is only ever going to me be and husband here, so having three sets of roles ("policies"), one for me, one for them, and one for everyone else shouldn't be real problem.
(I guess I can always just stick it in the database anyway).