Is it permissible for a woman to uncover herself in front of her maternal aunt's sons if she was nursed by their grandmother, thereby becoming a sister to their mother through fosterage?

It is permissible to marry one's paternal aunt's daughter if she is a foster sister, or if the paternal aunt is the daughter of the grandmother who nursed you, or if you were nursed by your grandmother with milk resulting from your grandfather's cohabitation. In this case, your grandfather would be your foster father, and his children would be your foster siblings, based on the Prophet's (peace be upon him) saying: "What is prohibited by lineage is also prohibited by fosterage."