This is probably really petty but I'm wondering what others think.
My DP and I got together when nephew had just turned four; he's now nine and so has known me more than half his life. He didn't really know my DP's ex well, as they'd been split up for a while.
I've noticed that he never calls me 'Auntie Sarah'. He occasionally uses my first name but mostly simply doesn't address me. He's also quite rude on occasion. He is having a rough time at the moment - his parents split up a bit over a year ago and it's hard on him. So a bit of rudeness is something I'd expect to see and not worry about. But the kinds of things he says and does ruffle me up a bit - for example he'll totally ignore me when I speak to him/if I ask him something, but will do it if my partner or his mother asks. Occasionally I get a reply like 'I don't need to do that' or 'no I don't have to,' and often he'll tell me what my DD (who's three) can and can't do. I don't think this last thing is intended to be cheeky at all, but I've noticed he doesn't do it with my partner.
It crossed both mine and my partner's minds that this may have something to do with us being woman, and him not having any other exposure to same-sex couples (though, as I say, he has known me for years ...).
I feel awkward asking him to call me 'Auntie Sarah' as he calls my partner 'Auntie Firstname,' but I find it kind of weird he doesn't. What would you think? For the record my own DD calls both of us by our first names on occasion; I don't find first names from children rude, it's just the way he seems not to see me as having that role at all.