Crack on and don't make an issue of it.
It GMG when someone turns round and says I'm this that or the other and wants special treatment.
I know a few lesbians and homosexuals and they just get on with their lives and don't bang on about it. A couple of chaps who we know live have always lived together and it wasn't until one of them got ill, that anyone was aware they weren't just a couple of blokes living in the same house. Similarly we worked with a girl for years who was a lesbian and again no one knew, until we went to wedding and she was there with her other half. Mind you she was the 'feminine' one,, ie not the "cropped hair and bovver boot" look, of her other half, which never looks good on a woman, IMO.
I know a vegan and she likes to let you know every time we see her, which is somewhat tiresome. If we go out for a meal and she's there I like to order steak that will run bloody and mention it several times, with a smile as it never fails to wind her up.