Apollo disagrees with the Furies. Apollo believed that Marriage is more momentous than having relations based on kinship because married love between man and woman is bigger than oaths, guarded by right/of nature.
Marriage of man and wife is Fate itself, 215
stronger than oaths, and Justice guards its life. But if one destroys the other and you relent -no revenge, not a glance in anger - then I say your manhunt of Orestes is unjust.
Some things stir your rage, I see. Others, 220
atrocious crimes, lull your will to act (Eumenides ...