What do you call a nonbinary aunt?

Could you elaborate on the term "nonbinary aunt" for me, please? Are we referring to a person who is not exclusively male or female in terms of gender identity, and who is related to you in the capacity of an aunt? If so, I understand that the language surrounding gender identity and family relationships can be nuanced and evolving. In this context, would it be appropriate to simply use the term "aunt," as the familial connection trumps the gender identity aspect, or is there a more inclusive or preferred terminology that takes into account the nonbinary aspect of their identity?