Honestly if you all are fine with it, let her and whoever else do it. I've been referred to as he, they, it, she, bro, dude etc. and honestly I do not mind, I would probably be more offended if someone called me a plant, lol. I don't really care what people call me, I'm fine being cisfemale and people using "other" pronouns to me doesn't matter. We're all just humans.
I'd say don't be confused, like if you all are enjoying it what's the harm. Also I just use brodude/man/whatever with like everyone I'm close with and we don't really take it as a gender-targeted thing.