SOLVED. Novel about a former nun helping to search for a serial killer [s]

[Wendy]

Hi, I don't remember the name of the author or the book's title. I read it around 15 years ago so hopefully I'm not mixing up the plot.
It's an erotic thriller about a former nun who is asked to go undercover as an escort for a billionaire, who is suspected of being a serial killer.
Some of the action takes place on his yacht. I remember roses/rose tattoos being involved and some knife-play.
I believe there was a scene where she was chosen by him after performing in front of a one way mirror.
The author had two other books in a similar thread whether continuations of the story or new characters I can't remember. The cover was either cotton candy pink or sky blue. Found it Innocence by Suzanne Forster

[Rainbowheart]

Glad you found it!

Innocence for the link.