Reference: Fataawa Mu’aasirah – Page 86
Question: A woman asks, saying that she embraced Islaam whilst she was involved in an impermissible (haraam) relationship with another man (boyfriend). So is she required to enter the ‘iddah (waiting period) if she wishes to get married or not?
Response: It is sufficient for her to allow the passing of one menstrual cycle. And Allaah has the complete knowledge of all affairs.
Translator’s Note: A Muslim woman is not allowed to marry a non-Muslim man, so it is assumed that either:
1) The questioner is asking about the ‘iddah since she now wishes to marry a Muslim man, or
2) She is asking about the ‘iddah since she now wishes to marry her boyfriend who is himself a Muslim,
…and Allaah [alone] has the Complete knowledge [of all affairs].