So here's my situation: I know I pass pretty well. I haven't had anyone call me "ma'am" in years, and unless I speak I don't even get any odd looks. But as far as my family is concerned, I am, at most, a crossdresser who likes a lot of things that are traditionally male (video games, reptiles, guns, knives, etc.).
However, I'm beginning to wonder if there is such a thing as passing too well. I'm not planning on coming out to them until I can live on my own. So when my little cousin started referring to me as 'he' when I took him to a card shop last month, I just let the family assume that he was a little kid who didn't know better and didn't bother correcting him when we were alone.
Then two weeks ago, at a funeral, two of my other cousins started saying 'he' as well. As I was in charge of keeping the children from bothering the adults, luckily no one else heard and I avoided having to say anything.
But today, while I was out with my mother, she accidentally called me 'sir'. She realized a minute later and apologized, and we just laughed it off. I'm hoping that when I do come out she'll have already guessed, but then I also had thought that she knew I was a crossdresser before I commented on it
a year after she started buying me boxers instead of female underwear.

So has anyone else ever had to deal with a situation like this?