Is it permissible for the husband's brother to marry his wife's sister, who was nursed by his wife (the mother of his children)?

If a woman breastfeeds her sister five times, then this sister becomes unlawful for the brother of the woman's husband, because he becomes her paternal uncle through rada'ah (fosterage), if the breastfeeding was with the milk of his brother. This is based on the Prophet’s (peace be upon him) saying: "What is unlawful by lineage is unlawful by rada'ah."