I haven't read Daughter of Mystery, but was interested when you were discussing it on the podcast, and now, with this post, I'm all the more intrigued.

Isn't it funny how words can mean the same thing, and yet the opposite, because when I hear "romance" I think of books with very little, if any, sex. Think Austen or, as mentioned above, Heyer, (I love Heyer).
So it's always strange to me when I'm cataloguing Mills & Boons at work and come across a sex scene. To me, Mills & Boons are nice little stories that grannies read. Which is true, but they also have loads of sex in them. And *that* is what most people think of when they hear/read romance.