All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
First of all, it should be mentioned that this is one of the most complex issues and the most serious matters because of the overlapping rights of people and the different parties disputing with each other, and the mixed family lineage. Therefore, this case should be taken to Islamic courts or to authorities that serve as Islamic courts and study the issues of Muslims in countries where there are no Islamic courts, so that it would seek details about things that need to be detailed and judge the matter accordingly. This matter should not be based on questions and answers from a distance because there are so many probabilities and the rulings differ according to each probability. Investigating all such probabilities is not possible in such a case.
In any case, we say that if the first marriage took place without a guardian, then it is a void marriage according to the view of the majority of the jurists as we clarified in Fatwa 86987. For more benefit on the conditions of a correct marriage, please refer to Fatwa 83629.
Even though this marriage is void, the marital relationship should be ended, either by the husband divorcing his wife, or that the judge invalidates the marriage. However, this marriage does not become invalid just by the wife saying that she will end the relationship.
Since you married her before that first marriage was invalidated, then your marriage to her is void, however, if you did not know that she is still married to that man, then your marriage to her is considered a doubtful marriage [i.e. you married her while believing that your marriage to her is valid].
Again we stress what we have mentioned that a Fatwa is not enough in such a case and that it is necessary to take the matter to an Islamic court or an authority that serves as an Islamic court in non-Muslim countries.
The following points should be mentioned:
1- The guardian is a condition for the validity of the marriage contract whether the woman is virgin or previously married woman (a divorce or a widow). The matter that relates to a virgin woman or a previously married is the matter of obliging her or not obliging her to marry (a man of her guardian’s choosing), but not the issue of marriage without the consent of her guardian.
2- Obedience to parents comes in priority over marrying a specific woman unless not marrying this woman causes harm or hardship to the son while the parents have no sound reason for objecting to him marrying her.
3- You are obliged to obey your father in this issue because your relationship with this woman is illegal after you had known that she is married to that man.
Allaah Knows best.