2392. Matrimonial relation is haraam with women who are one's Mahram, for instance, mother, sister, daughter, paternal aunt, maternal aunt, niece (one's brother's or sister's daughter) and mother-in-law.
2393. If a man marries a woman, then her mother, her maternal grandmother, her paternal grandmother and all the women as the line ascends are his Mahram, even if he may not have had sexual intercourse with the wife.
2394. If a person marries a woman, and has sexual intercourse with her, the daughters and grand-daughters (daughters of sons, or of daughters) of the wife and their descendants, as the line goes low, become his Mahram, irrespective of whether they existed at the time of his marriage, or were born later.
2395. If a man marries a woman, but does not have sexual intercourse with her, as long as their marriage lasts, he can not marry her daughter.
2396. The paternal and maternal aunt of a man, and the paternal and maternal aunt of his father, and the paternal and maternal aunt of his paternal grandfather, and the paternal and maternal aunt of his mother, and the paternal and maternal aunt of his maternal grandmother, as the line ascends, are all his Mahram.
2397. The husband's father and grandfather, however high, are the wife's Mahram. Similarly the husband's sons and the grandsons (son of his sons or of daughters), however low, are her Mahram, regardless of whether they existed at the time of her marriage or were born afterwards.
2398. If a man marries a woman (whether the marriage be permanent or temporary) he cannot marry her sister, as long as she is his wife.
2400. A man cannot marry the niece (brother's or sister's daughter) of his wife without her permission. But if he marries his nieces without his wife's permission, and she later consents to the marriage, it will be in order.
2401. If the wife learns that her husband has married her niece (brother's daughter or sister's daughter) and keeps quiet, If she does not consent later, the marriage will be void.
2402. If before marrying his maternal or paternal aunt's daughter, a person commits incest (sexual intercourse) with her mother, he cannot marry that girl .
2410. If a person marries a woman knowing that she has a husband, he should get separated from her, and should also not marry her at any time afterwards. And the same rule will applyif he did not know that the woman was already married, and had sexual intercourse with her after Nikah.
2412. In the case of the woman who has been divorced, or a woman who contracted a temporary marriage and her husband forgoes the remaining period of marriage, or if the period of her temporary marriage ends, if she marries after some time, and then doubts whether at the time of her second marriage, the Iddah of her first husband had ended or not, she should ignore her doubt.
2413. If a person commits sodomy with a boy, the mother, sister and daughter of the boy become haraam for him. even if both are not baligh(adult) . But if one suspects that penetration does not occurred or doubts whether penetration occurred or not, then the said woman would not become haraam.
2414. If a person marries the mother or sister of a boy, and commits sodomy with the boy after the marriage they will not become haraam for him.