Question: What is the meaning of the expression used by the jurists that “there is no waiting period (‘idda) for an adulterous woman because of her adultery”?
Answer: It means that she is allowed to marry after having committed adultery without observing the ‘idda; and, if she is married, then it is permissible for her husband to have sexual relations with her without observing the ‘idda, she would need to seek repentance and forgiveness.
Ayatollah Al-Sayyid Ali Al-Husseini Al-Sistani