Romance...with a blatantly non-human creature...is this pushing it?

There has been a lot of romances in YA between protagonists who are human and love interests that are...well...not. However, with all of those romances the non-human creatures that the protagonist fell in love with happen to be creatures that look, well...human. Vampires are just humans with pointy teeth and no pulse. Angels are just humans with wings. However, I have a story idea I got that, while not a romance story, has a romance between a human and a non-human as a plot point. The story itself isn't focused around this romance, though. The story is actually a epic science-fantasy adventure where the protagonist is forced into a fetch quest(that turns out to be much, much more then a simple fetch quest) against their will that takes them across many different worlds, and the one who forces them into it also happens to eventually become a love interest of sorts. The catch? They are a dracolich. What dose this mean? In their true form, they don't look remotely human. This character's true body is that of a giant, skeletal dragon. Not a human with fangs. Not a human with wings...a giant, skeletal dragon.

Now, they do spend most of their time in the story in human form, and as of yet I do not plan to have any...sexual..scenes between them and the protagonist due to the fact that romance, while a plot element, is not really the focus of the story. However, I don't know what will happen between these characters as things develop. While they would of course be in human form, I'm wondering if the fact that the protagonist is both in love with, and may possibly have sex with a giant bone dragon(though one that takes the form of a human) would just be going TOO far. I mean, that's technically both necrophilia and bestiality at the same time...even if the big bone dragon looks like an attractive human the whole time.

Would such a romance be pushing things "too far" or is this really no different then all the "human with X magical creature" romances out there as long as the dracolich in questions sticks to their human form?

Yeah, it's a bit harder to do something like that with this once since the character is undead and skeletal in addition to being a dragon...which means in their true form their reproductive organs have likely rotted/decayed away. As for whether or not the story is YA, I'll cross that bridge when I get to it, but it has a teenage protagonist and alternates between world hopping and HS stuff.(The story roughly follows, and parodies/plays around with the wake-up, go to school, save the world kind of setup, except replace "save the world" with "look for that blasted reality warping artifact and perhaps conquer the world I happen to be searching on today in the process." It's not episodic, though, but at the start it feels kinda like it is until things get significantly darker and the story comes together. Oh..and yes, the dracolich shows up during some of the school parts as well....and not in the manner your thinking.)