Instead of assuming what you don't know for sure, just ask. If you can't get some kind of identifier, describe it the best way you can. That is, without oversimplification or reduction to a label just for the sake of it.
It hasn't been hard to see that morning news is getting gayer and gayer. But the confirmation by Robin Roberts of the widely assumed -- but rarely discussed -- fact that she is a lesbian in a long-term relationship is on another level entirely.