Okay, so, I have no idea if anybody is still following this thread, but it's come to my attention that I suck at folling up at stuff, and since I thought of this thread today, I figured I ought to post a follow-up.
The long and the short of it was this: we decided to just basically talk the way we normally would, though I tamped down a little of my anti-homophobic rhetoric for a while (because I can understand how someone who doesn't know me well might not get the difference between how I feel about people who are actively, publicly homophobic, and those who believe that homosexuality is wrong, but don't harrass others because of it). The aide either didn't notice, or didn't care; she never joined in any of the discussions one way or the other. (Okay, I admit, I didn't try THAT hard to include her; it felt like rocking the boat.) Unfortunately, she had to leave for unrelated reasons, and since then, most of the people who've been working with my grandmother have been much less openly traditional, making it a lot easier to deal with.
As I mentioned, I thought of this thread today, and I figured I'd mention why: Missy had what might have been a great suggestion, had the original aide still been around today: my uncle (my grandma's son) and his family came over, and while we were looking at pictures, my aunt mentioned that she recognized an outfit that "John and Andy"* had purchased for my cousin. And I thought to myself "Huh. What a wonderful opportunity that would have been to say to the aide 'I forget if we've told you about John. John's been my uncle's best friend since they were kids; his family lived in the house behind grandma's.' and then segue that--as we frequently do, on the level, when we talk about John--into a discussion about nature and nurture, since both John and either one or two of his three siblings are gay." (*names changed, even though the men in question are both out.) Because, y'know, since we speak of John and Andy and John's siblings with nothing except love (and a funny story I like to tell involving my grandma being strongly for gay rights, and yet still sometimes not quite "getting it"), that would probably get the message across that we are not only pro-gay-rights politically, but that our personal feelings about gay people are that, well, we don't care!
In any case, I really wanted to thank everyone here for their suggestions. They were all worth considering, and it was really helpful to have several different viewpoints and ideas to choose from to fit the situation. And, I promise, I really will try to be better at correspondence around here!
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