Answer:

bigamy

Answer	Crossword Clue
BIGAMY	Grounds for annulment, often
BIGAMY	Marital excess
BIGAMY	Crime committed by a two-timing spouse

BIGAMY	Marriage crime
BIGAMY	Multiple groom's crime
BIGAMY	A species of polygamy
BIGAMY	Espousing crime?
BIGAMY	Marriage-related crime
BIGAMY	Twice-committed crime?
BIGAMY	Problem with more than one marriage?