I also oppose divorces, but your idea will only further encourage them. Something happens => immediately go to court. Court => they will argue even more, and then they will definitely get divorced.
Second. A person must be responsible for their actions, and such indulgences do not contribute to this. It would be different if the crime was committed while intoxicated... Then the person really doesn't control themselves. But otherwise, I don't see why the punishment should be reduced. It's like, I don't know... A creditor kills a debtor, and his sentence is reduced because the debtor owed him money.
e si ieu muoir, er mi grans deliuriers