Is it permissible to marry one's paternal aunt's daughter, given that the mother was breastfed by the paternal grandfather's second wife, who bore a half-brother to the father?

If your grandfather's wife produced milk due to your grandfather's intercourse with her, and you suckled from her five times, then she is your wet-nurse mother, and your grandfather is your wet-nurse father. Your father and your paternal aunt become your wet-nurse siblings, and your paternal aunt's daughter is your wet-nurse sister's daughter, and you are her maternal uncle. Therefore, it is not permissible for you to marry her, due to the Prophet's (peace be upon him) saying: "What is prohibited by lineage is also prohibited by suckling."