Joining family into ICloud Shared Storage

Hi,

I have a question regarding 'ICloud Shared Storage'.

We are a family of Apple devices (IPhones/IPads).

I recently setup a 'family' account for my two kids, while my wife, as she uses her own CC and it's a more business use had her own account (which included an IClouse Storage subscription) apart for the family account.

Now with the shared storage feature, i was wondering if I can add her to the family account so we can all enjoy the cloud storage - or is it more complex ?