Per Ilona's blog on author branding and pseudonyms, Milla Vane is a pseudonym for Meljean Brooks. I have not read anything else by her, but apparently she normally writes steampunk.
While I ended up skimming most of the sex scenes in her novella to get to the story, the first one was pretty important for character development and worldbuilding. Like you, I can live without a lot of the stuff that goes on in those scenes, not to mention the language. That said, she did a very good job of establishing that the heroine's social culture and personal perspective allowed her to view the sex as her choice, and therefore as consensual rather than rape. However unrealistic this would be in our own culture, the story supported it well. Even some of the plants and animals of her world were distinctly different from our own, and going into the sex scene the heroine's inner dialogue mentions that her culture enjoys sex, and lots of it. So I found Milla Vane's writing much less offensive than some of the PR set in our own or historical cultures, which uses "forcible seduction" as a happy ending, or even as a means to one.
However, if the sheer amount of sex in the novella is any indication of the amount in her regular books, other stories are calling me.