When I was visiting my old high school last year I went to see my old art teacher and she asked me if my gf (who she also taught) and I were dating, because there were rumors among the faculty. (I swear, they're worse than the students at that school)
I said yes, and we talked about how she was doing for a couple minutes, during which time she let a female pronoun slip. No one but a few of Wren's very close friends knew at this point, so I did a bit of a double-take. Turns out she figured it out on her own a long time ago, and was just waiting for her to come out!