مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٥٢١ - to become his

a child in accordance with the conditions mentioned above all those children become mehram of oneanother as well as of that man and of all those women.
٢٤٨٨. If a man has two wives each one of them can suckle a child, and if, for example, one of them gives milk to a child eight times and the other gives him milkseven times the child does not become the mehram of any one of them.
٢٤٨٩. If a woman gives full milk to a boy and a girl out of the milk of one husband the sisters and brothers of that girl do not become mehram of the sisters andbrothers of that boy.
٢٤٩٠. A man cannot marry without the permission of his wife those women who become her nieces (sisters daughter or brothers daughter) owing to the sucking ofmilk. Furthermore. if a person commits sodomy with a boy he cannot many his foster daughter. sister, mother or paternal grandmother i.e. those women who have become hisdaughter, sister, mother and paternal grandmother by means of sucking milk.
٢٤٩١. A woman who suckles the brother of a person does not become his mehram, although the recommended precaution is that he should not marry her.
٢٤٩٢. A man cannot marry two sisters although they may be foster (i.e. may have become sisters of each other by means of sucking milk). In case, therefore, he marries two women and understands later that they are sisters and in case their marriages took place at one and the same time he has the option to adopt any one of them. In case, however, the marriages did not take place at one time the first marriage is valid whereas the second is void.
٢٤٩٣. If a woman suckles the following persons with her husbands milk her husband does not become unlawful for her although it is better to observe precaution.
(i) Her own brother and sister.
(ii) Her paternal uncle and paternal aunt and paternal uncle and maternal aunt.