Marital, conjugal (7)
I believe the answer is:
nuptial
I believe this is a double definition.
'marital' is the first definition.
(I've seen this before)
'conjugal' is the second definition.
(thesaurus)
(Other definitions for nuptial that I've seen before include "Relating to marriage" , "Matrimonial" , "Relating to matrimony" , "Relating to weddings" , "Marital" .)