If they were never married (even Common Law), they shouldn't be attached as spouses.
I use the "do not display" option for my mother's marriage to my father, because she would come back to haunt me (rather difficult, as she was cremated and her ashes scattered, but my Mum could do just about anything) if I had her profile display her as "wife of" a man who had not been her husband in fact since the 1950s (no matter that the law had them as legally husband and wife until the divorce in the 1980s).