Is it permissible for a woman to take milk-inducing pills to breastfeed a girl who is not her biological daughter, and would this establish fosterage and make her unlawful for her husband [to marry]?

A woman's motherhood is established for the one she suckled, whether her milk flowed due to intercourse or medical treatment. Thus, an unmarried virgin is considered a mother to the one she suckled, according to the majority of jurists, which is the stronger opinion. Based on this, the girl whom you suckled becomes your daughter through suckling, and she is permanently forbidden to your brothers, your paternal uncles, and your sons. Likewise, she is forbidden to your husband with whom you have consummated the marriage. Therefore, there is no harm for those mentioned in entering upon her and being alone with her.