If suckling is established, who are the milk-siblings of this child: are they the sons of the nursing woman from her second husband, or the sons of her first husband from his second wife? And are the milk-mother's brothers and sisters, who are so only through their father, considered maternal uncles and aunts to the milk-child, making it permissible for him to shake hands with them and meet them? And is the mother of the nursing woman considered a grandmother to the milk-child, making it permissible for him to shake hands with her?

A child who nurses five times from a woman before weaning becomes her son through suckling, and her husband, who caused the milk to flow, becomes his father. Consequently, all their children become siblings to this nursed child, whether they were born before or after the suckling, and whether they are from the nursing wife or another wife.

Moreover, the siblings of the nursing woman, both brothers and sisters, are considered maternal uncles and aunts to the nursed child, and the nursing woman's mother becomes his grandmother. There is no sin upon these relatives in meeting, shaking hands with, or uncovering before the nursed child. Sheikh al-Islam Ibn Taymiyyah mentioned that all relatives of the nursing woman become relatives of the nursed child through suckling, thus making it unlawful for him to marry them.