What is the effect if each of the older wife's daughters provides only one suckling to the young wife?
General Chapter
Al-Mughni
Book of Fosterage (Breastfeeding)
Primary text
If each daughter provides one suckling, the sound opinion holds that the older wife (the grandmother) does not become forbidden because her status as a grandmother via suckling depends on one of her daughters becoming a mother through suckling, which has not occurred. However, there is a potential view that she becomes forbidden because the equivalent of five sucklings is completed through her daughters.
Supporting text
Similarly, the same debate applies if the suckling comes from the wife's daughter (one suckling), the daughter's son (one suckling), and the granddaughters (three sucklings). If the five sucklings are completed from the wife's milk, her mother, her sister, her daughter, and her son's daughter, there are two views; the sounder view is that prohibition is not established. Under the second view, prohibition is established, her marriage is nullified, and the amounts paid for her *mahr* are reclaimed from them according to the amount of suckling contributed by each.