Is it permissible to marry the daughter of a maternal aunt if the grandmother breastfed the questioner along with his maternal uncle?

If your grandmother breastfed you, then you become her son and her husband's son through breastfeeding (radhâ'a). Her sons and daughters become your brothers and sisters through breastfeeding. Therefore, it is not permissible for you to marry your maternal aunt's daughter, because she is considered your sister through breastfeeding, due to the Almighty's saying: "Prohibited to you are your mothers, your daughters, your sisters..." until His saying: "and your sisters through suckling (radhâ'a)," and due to the Prophet (peace and blessings be upon him) saying: "What is prohibited by lineage is also prohibited by suckling (radhâ'a)."