Answer
(Fatwa: 1094/1094/M=1432)
(1) It is wrong if your friend’s bhabi does not want to live with her husband without any valid excuse. She is guilty. It is a sin to demand talaq without any valid reason. If the woman is not ready to live with her husband in any case and all the attempts of mutual understandings have gone in vain, then the husband should give only one talaq and make her free and should not keep her suspended.
(2) There are two different incidents. The woman that came as war spoil was Hadhrat Safiya (رضى الله عنها) who came in the share of a companion (رضى الله عنه) and he gifted her to the holy Prophet Muhammad (صلى الله عليه وسلم) and later the holy Prophet Muhammad (صلى الله عليه وسلم) set her free and married her and never divorced her. This is narrated in Sahih Bukhari. And the woman whom he married and divorced immediately after union it was Umaima bint Noman, as mentioned in Al-Bidayah O al-Nihaya, Vol. 5, p. 297.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband