The definition of "Aunt" (Patreon)

Since this question keeps coming up, without trying to give away any spoilers, I'd like to let my readers know the definition of the term according to Google:

aunt

noun
the sister of one's father or mother or the wife of one's uncle

INFORMAL
an unrelated older woman friend, especially of a child

Therefore, if one of my male main characters were to have a hypothetical child but didn't marry said child's mother, every other adult female in that child's life could be referred to as "Aunt".

In other words, just because the child refers to a particular woman as "Aunt XYZ" does not prevent woman XYZ from marrying the male main character and becoming his wife. In fact, the only thing the title does is rule out woman XYZ from being the child's mother.

Got it?