مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٥٢٢ - WAYS AND MANNERS OF NURSING A CHILD

(iii) The descendants of her paternal uncle and her maternal uncle.
(iv) Her nephew (brothers son)
(v) Brother or sister of her husband.
(vi) Her nephew (sisters son) or the nephew (sisters son) of her husband.
(vii) Paternal uncle and paternal aunt and maternal uncle and maternal aunt of her husband.
(viii) Granddaughter (daughters daughter) and grandson (daughters son) of another wife of her husband.
٢٤٩٤. If a woman suckles the paternal aunts daughter or maternal aunts daughter of a man she (the woman who suckles) does not become mehram of that man. However,the re commended precaution is that he should refrain from marrying that woman.
٢٤٩٥. If a man has two wives and one of them suckles the paternal uncles son of the other the wife, whose paternal uncles son is suckled, does not become unlawfulfor her husband.

WAYS AND MANNERS OF NURSING A CHILD
٢٤٩٦. The childs mother is the best woman to suckle a child. It is better that she does not claim recompense from her husband for suckling the child, although it is a good thing that he should reward her for that. However, if the mother demands more recompense as compared with a wet nurse, her husband can entrust his child to the wet nurse.
٢٤٩٧. It is recommended that the wet nurse, whose services are obtained for a child. should be Twelver Shiah, chaste and good looking, and it is abominable that she is not a Twelver Shiah or is ugly, ill humored or illegitimate. It is also abominable to entrust the child to a wet nurse who has given birth tb an illegitimate child.