Master — Mari Carr

Foreign Affairs, Book Three
A forced-sex fantasy is one thing--waking to find a scruffy man binding you to a bed is quite another. Amy fights him, until she realizes her friend must have set up the sexy scenario. They've swapped lives, with Harper flying to Australia and lending her Chicago home to Amy. While she's surprised Harper would go to such lengths to help her fulfill a fantasy, Amy figures...why not?
After days of nonstop travel, Andrew arrives at the home he shares with his sister, Harper, with sleep on his mind--until he finds a naked intruder in his bed. Subduing the beauty, he assumes she's the blind date his pal had tried to set him up with. But would Mike actually sneak the woman into Andrew's house? Seems so. And he's not one to turn down such a gift.
By the time each has learned the other's identity, Amy and Andrew have shared the most intense sexual experience of their lives. And they certainly don't want to stop now.