I agree with renu...2 brothers and 2 sisters children are not allowed...here zain being USMAN and Aliya being Ghulam so there is a difference in relation even if they are cousins...
Divorce is done 3 times coz of there are chances of coming back together b/w 2 of them then they can come back...there must be 3 months of waiting b/w each talaaq as far as I know and if the husband wants to take back his wife in the second or third month then he can do so by remarrying or willingly taking her back...but if things do not patch up still there is second talaaq and same process and finally the third one...and there is no turning back in the third...which leads to HALALA...
It may sound confusing because BI showed talaaq in a very fast pace but generally the rules of talaaq are quite strict in Islam and it takes time...so basically three talaaq process is done so that one can patch up after minor differences...as talaaq is forbidden in Islam only in extreme cases it is allowed...
Don't think I have done PHD in talaaq...😆...but the way it was shown we all had to go through every info required to save ZAYA..,,😆