Couples appointments

In my practice, I regularly see couples. I would like to be able to send a personalised email appointment confirmation and SMS appointment reminder to each individual, but manage the client/treatment notes as a couple.
I currently achieve this by creating three separate clients (Individual 1, Individual 2, Individual 1+2) and creating a Group booking for the 3 separate client entities. The individual client accounts are used solely to facilitate the communications and the combined account (Individual 1+2) is used to manage client/treatment notes and any associated documentation.
I am seeking a solution that better enables the management of couples appointments within Cliniko, without the requirement for a workaround. The minimum requirements would be the ability to send automated personalised emails/SMS to each individual (confirmations/reminders) or a single individual (invoices/receipts), and management of client files/treatment notes as a couple.