Recrimination

n. act of making a countercharge against an accuser

In law, recrimination is a defense in an action for divorce in which the accused party makes a similar accusation against the plaintiff. In plain English, it is a lawyer's way of saying "you too." Recrimination was generally considered by family law experts to be one of the most dysfunctional and illogical aspects of the old fault-based divorce system in common law countries. For example, in the context of a marriage where the marital relationship has collapsed to the point that both spouses are openly committing adultery, the assertion by either spouse of this defense would prevent a divorce even though the family unit is clearly no longer capable of functioning.
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Noun
1. mutual accusations
(hypernym) accusation, accusal

n. recrimination, expostulation

(n.)
The act of recriminating; an accusation brought by the accused against the accuser; a counter accusation.