Are there other defenses to grounds for divorce?

Yes, of course. There are tactical maneuvers. For example, if a husband were being sued for divorce on the grounds of adultery, it would be a defense to claim that the adultery never took place. A wife could claim that the required statutory time period for separation has not yet occurred.

When spouses choose to make divorce war, however, the strategic decision is, in whose interest is to remain married longest?

Another defense, which was not uncommon, was the claim that the complaining spouse knew of the misconduct before marriage and is therefore barred from using it as grounds. This claim most frequently arose in cases of alcoholism or drug addiction.