Two years ago, I married my cousin, who stayed with me for three years, but did not bear me any children. I divorced her and she married another man and together they had a boy and a girl. He died and she married my cousin and she gave birth to boys and girls from him. Now I want to marry one of my children off to one of my cousin's girls from that woman whom I was previously married to, is it permissible?
If the situation is as you mentioned, it is permissible for any of your children to marry any of your cousin's daughters from the woman whom you were previously married to. There is no relation between your previous marriage to her and the marriage of your children to one of her daughters from another man. (Part No. 18; Page No. 346) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.