Board Thread:News and Announcements/@comment-6533159-20151015224111/@comment-14138255-20151020004719

In Fullmetal Alchemist, Ed and Al's parents weren't married, effectively being common law husband and wife. I have a feeling Taiyang and Raven didn't even stay with each other for very long, but Taiyang and Summer probably became husband and wife (if only by common law).