Asad turns to Ayaan and he agrees to marry Zoya with the plan to divorce her. It is upon her marriage to Ayaan that Zoya soon finds out that her father is mamujaan. Mamujaan is delighted to find out who is his true daughter. He thinks Asad married and divorced her to get back at him and embraces her with open arms as Ayaan's new wife.
The relevant point here is that a Halala cannot be planned in advance, as a Nikah between her and the second husband with an understanding of a divorce afterwards will not be valid. If she does so, it will be an illegitimate relationship with the second husband and with the first husband also with whom she comes to live after a pre-planned Halala. The Prophet (Pbuh) has cursed both such men who perform Halala and for whom Halala is performed. The second Caliph Hazrat Umar ruled during his reign that he will punish with stoning to death, those who perform a pre-planned Halala. Imam Sufian Sauri says: " If someone marries a woman to make her Halala (for her ex-husband) and then wants to keep her as wife, he is not permitted to do so unless he solemnises a Nikah afresh, as the previous Nikah was unlawful." (Trimizi)
http://www.islamawareness.net/Talaq/talaq_fatwa0008.html
It is Nikhat and Nuzat who eventually reveal to Asad that Zoya is pure as the snow and that nothing ever happened to Zoya. Will Asad be convinced and willing to love Zoya again and will Dilshaad embrace Zoya again?
A man divorced his wife thrice (by expressing his decision to divorce her thrice), then she married another man who also divorced her. The Prophet was asked if she could legally marry the first husband (or not). The Prophet replied, "No, she cannot marry the first husband unless the second husband consummates his marriage with her, just as the first husband had done." (Bukhari, Volume 7, Book 63, Number 187)
http://www.muftisays.com/qa/question/2668/halala.html