The solution to this would be for WikiTree to add a qualifier to the "Spouse" connection to allow people to be labeled as "partners" (or perhaps "not legally married", but I'd prefer "partners"). I can see that implementing that feature could be a problem technically, but it would help resolve a lot of concerns that people have about gay marriages and domestic partnerships, common-law marriages and similar unofficial arrangements that were culturally accepted, modern people who live together without marriage (and might have children without bothering to marry), and also my black-sheep ancestor who abandoned his wife and children and openly shacked up with another woman for several decades.