This level smut is not for the faint of heart. The book itself is so dated. It would never pass muster if it were published today. Putting all of that aside, the story itself is fabulous. Weaving the past and present together to culminate in a satisfying ending makes for a very hard to put down-able book.
Huge flashing trigger warnings on this one. And you have to bear in mind when it was written and published. But the actual story? Pure escapist bliss.