Being married to a woman and another whose father is married to the first's mother at the same time
I am a married man, whose wife is still alive. However, I want to marry a lady whose mother was married to my current father-in-law, but did not beget any children from him. He divorced her
and she married another man and gave birth to that lady whom I want to marry. It is worth mentioning that my wife is from another woman whom my father-in-law married after he divorced the woman mentioned above. Is it permissible to marry this lady along with my first wife or should I divorce my first wife? Could you kindly advise? May Allah reward you with the best.
If the reality is as you have mentioned, it is permissible for you to combine between the mentioned lady and your current wife. Your father-in-law's marriage to the mother of the girl whom you want to marry has no effect on the permissibility of marrying her. The basic ruling is that this marriage is permissible and there is no evidence that prevents it. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.