First off. I feel ripped off. I open the file to see 24 pages and halfway through, the book ends. The other half is publicity for the author's other books. Moving past that, not sure how to rate this. I gave it 3 stars because I found the sex scenes hot. But the story itself, not so much. 2.5 stars.
Still, if the installments are that short, I might try the second one also, just to see what else these two are up to.