I have a problem with most situations in which a more powerful individual takes sexual advantage of an underling

Yes. Totally agree. So much bad romantic fiction (fanfic and otherwise) just throws people in bed without really thinking about the implications or consequences of power dynamics etc.

Now you have me trying to lay the groundwork for an in-depth story about the two. Hmmmm...

Well, that was the idea, yes? :) I am still not convinced that we could realistically make it into a romance, though.