A:
It is not permissible
to marry or even to propose to a woman who is already married or engaged to another person until the marriage is terminated through divorce or the engagement is broken off . Even after the divorce, no proposal is allowed until her `Iddah (woman's prescribed waiting period after divorce or widowhood) is expired. Allah (Exalted be He) says:
And do not consummate the marriage until the term prescribed is fulfilled. And know that Allâh knows what is in your minds
(Part No. 18; Page No. 250) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.