Remarriage without the first wife's consent is inappropriate and unethical, and maintaining justice is obligatory.
In Islam, remarriage for men is permissible under specific conditions, but a crucial principle is maintaining justice among spouses. In the Holy Quran, Allah emphasizes the importance of justice in remarriage in Surah An-Nisa, verse 3. This verse states that if men fear they cannot be just to their wives, it is better to marry only one. Therefore, remarriage without the first wife's consent implies a lack of justice and sensitivity toward her feelings, which is considered morally and religiously inappropriate. Moreover, there are specific conditions for marriage contracts that must be acknowledged. In Surah An-Nisa, verse 129, it is also stressed that men will never be able to establish complete justice among their spouses. Thus, remarriage without the first wife’s consent is not only religiously questionable but can lead to the destruction of familial relationships and justice among individuals. Ultimately, based on Islamic teachings, it is advised that before making a decision in this area, discussions and consultations with the first wife should take place, considering her feelings and perspectives.
And if you fear that you will not be just to the orphans, then marry those that please you of [other] women, two or three or four. But if you fear that you will not be just, then [marry only] one or those your right hand possesses. That is more suitable that you may not incline [to injustice].
And you will never be able to be just between the women, even if you strive to do so. So do not inclines wholly to one and leave another hanging. And if you amend and fear Allah - indeed, Allah is Ever Forgiving and Merciful.
One day, a man decided to remarry without the consent of his first wife. He thought he could continue his life without fairness and justice. However, when he spoke to his first wife, he realized how much hurt and upset she was. This conversation gave him a chance to reflect on justice and his wife's feelings, leading him to make a wise decision.