Be excellent to each other.
I'm in an extra interesting position presently. Let's start with the gameplay perspectives:
I play a Protection Warrior currently, and I'm looking to partake in tanking for my guild. In most cases, this is fine, even with the use of Vent and all that. My significant other is a healer in the same guild, and we're working our way in and being friendly. And it's a great guild, one we both enjoy very much.
But the kicker is that both my partner and I are Transgender, Male to Female, and hoping to start transitioning this year. We RP a couple of female Pandaren with the same guild, and after discussing it with eachother, we've decided we want to do what we can to simply stealth it. It's far easier to just be what we feel we should be online than it is to try and explain it all over again.