Funny that this pops up again after such a long time
But to answer your questions, yes, we had a couple of talks about the game and our sex life in general. One evening I even showed my better half around the game, but as she is not really into video games in general, she was on one hand fascinated about the mmog adult character of the game (and the number of ppl playing it), but at the other hand it seemed weird to her that pixel sex could be something grown ups would find "hot".
The best thing however is that we talked about it, that we were honest about our relationship and about the kind of sex we have and want to have.
So yes, all worked out well for both of us and I'm still here, really enjoying the game, with my significant other now knowing that I play it.