Kelly Addams 
Roulette [EPUB ebook] 

Arisa has never thought about the concept of one person being the property of another, that is until the Agency came to visit her small village in the north of Thailand and she found herself bought and shipped off to a client in Britain, she was to become his sex slave and concubine, until a kinky game of chance leads to her swapping owners, and discovering that she has a sadistic streak!