Several of our guests are in nontraditional relationships. Many of them were either married prior to becoming nonmonogamous, or else they reject marriage/hierarchical relationships for themselves, and have several equally important relationships. We are the first of our friends to get married so this isn't a common situation in our circles with previously accepted protocol.
Unfortunately, this subject isn't covered in your typical Miss Manners for wedding etiquette! We are trying to figure out how to address our invitations and how far to invite through poly networks.
For example, one of our friends is married and has four children with her husband. Her husband has a girlfriend of 5 years. The wife also has a live in boyfriend, and an additional partner of 4 years. So we're at 9 so far- and that's if we cut it off before getting to the partners of the partners.
cont'd