Allow me to divulge in more detail my view; this is such a small issue (or rather should be) yet it is something that should already be in the game. As it stands relationships are nigh on 2 dimensional and have barely any worth in how historical figures interact with each other; they act on the whims of numbers and have little discernible motives for their actions, with rare exceptions.
To those who find it somehow abhorrent or cannot imagine a fantasy world simulator set in a bronze/iron age world, in Pagan Rome heterosexuality was not the social norm, and throughout ancient literature we see homosexual relationships being driving forces for narratives that present more than rescuing the damsel in distress, like the stories of the Egyptian Gods Set and Horus, The Greek heroes Achilles and Patroclus of the Trojan War, Ganymede and the Greek God Zeus also in the Iliad, Emperor Hadrian and Antinous, Sappho and her poetry.
The list, it goes on. A person's sexual identity being used to label them is a very recent thing spurned on by the advent of Abrahamic religion and the Western world, much like Creationism appearing around the advent of the theory of Evolution.