Is it permissible for me to marry my paternal aunt's daughter if my paternal aunt's son and I were both suckled by his mother (my paternal aunt)?

It is forbidden to marry your paternal uncle's daughter if her mother breastfed you five known full feedings, because she is considered your sister through rada'a (wet-nursing), due to the Prophet, peace and blessings be upon him, saying: "What is forbidden by lineage is forbidden by rada'a."