If a person breastfed from a girl, do her sisters and daughter become unlawful for him?

The meaning of "if a person breastfeeds from a girl" is not clear. However, fosterage establishes the same prohibitions as lineage, based on the Prophet's (peace be upon him) saying: "What is forbidden by lineage is also forbidden by fosterage." Thus, whoever breastfeeds from a woman becomes her son and the son of her husband, the source of the milk, and all those who breastfed from her become his mahrams. If a person breastfeeds with a woman, they become foster siblings. Her daughters become forbidden to him because they are his foster nieces. Her sisters, however, are not forbidden to him unless he also breastfed from their mother or from their father's milk.