Click on the contact name to open the Edit Contact menu. Under the First Name field, select Add Couple/Family Member.
Enter a Couple/Family Greeting to appear on the front of the envelope (e.g., The Nichols, Hailey and Nathan Nichols, or The Nichols Family). Then add the first and last name, plus any contact information, for the additional member.
If you provide a unique email address, that person will receive their own invitation—but their RSVP will still be grouped together.