If you mean like a slow transition kind of thing, then I'm sorry to say, probably not.
Sorry for the confusion, i think I need to just update the description.
As for the player, yes, there is no immediate in between option. You can transition from Male to Female over a short period, start as one or the other, or there is a character who can immediately change you between the two later.
But for NPCs, there is a character that is a woman with a dick that exists which you can interact with.