There is a Fatwa by a Mufti that own father and son can have marriage with own two sisters. If it is like can two own brothers can have marriage with mother and daughter i.e., elder brother marriage with mother who take divorce from her first husband, and her daughter has living with her after divorce of her mother, Can younger brother have marriage with the daughter whom she was born to former husband of her mother? In brief two own brothers can have marriage with mother and daughter?
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. We ask Allaah to exalt his mention as well as that of his family and all his companions.
There is no harm for a brother to marry a woman and his other brother to marry the daughter of this woman, i.e. the step-daughter of his brother.
For more details, please refer to Fatwa 85868 and 89391 about women whom a person is not permitted to marry.
Allaah Knows best.
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