She is opening up more and more all the time, and while vaginal sex is likely a ways off yet, I can see anal on the horizon. She has been getting more and more sex positive advice, from not just the player, but even their
church's oracle. So, I don't think it will take too much longer as these things go, but YMMV. Also, you have to compare the time that passes in the game, and the time between stories as malleable. I mean, my character has owned that hotel for nearly three years in game time, but the plot doesn't really consider that.
If nothing else, we should see an expansion of her repeatable scenes soon. To me, the next logical step would be to have a repeatable option to finger her, and to start going down on her. ...It's only fair after all.