We are talking about women who follow the Greek Gods and have a specifically greek outlook. The greeks did have Thiasoi in Lesbos where you had women learning of art and culture through other women, as well as lovemaking. You had Sparta that believed in female to female relationships as a form of sport and athletics. In Plato's symposium, he does talk about "women who do not care for relations with men. Even in Amazon culture, you had a vase depicting a female huntress giving a love gift to the queen of the Amazons.
Check out the link I provided. There's also Perez giving us the rundown on homosexuality, masturbation and divinity as it pertains to Amazons, in a specifically roundabout way.
I believe tehre's enough background for Wonder Woman to have had relations with a woman, considering her greek cultural background. Also, homosexuality wasn't really a thing in ancient greek culture...it was just a part of life, which is probably how Wonder Woman sees it: It does not matter if she loves a man or a woman, just that she loves.
That reading to me is better than Diana not being attracted or loving other people until Steve. That part always felt wrong to me...too Lilo from 5th Element to be interesting.
I'm not arguing that homosexuality wasn't accepted by ancient Greek culture, it was. I'm saying that any enchantment that grants immortality and separation from men would have to involve removing sexual desire from the recipients, since an eternity wanting what you can't have would be sadistic. And accepting homosexuality or not, there's no way that Greek culture was majority homosexual. Consequently, it's reasonable to argue that the Gods suppressed the Amazons' sexual desires.