Title: A Dangerous Captive
Link: https://www.webnovel.com/book/a-dangerous-captive_17601669606843305
Genres: Romance, Action, Mafia
Synopsis: Adelaide is a trained assassin sent out to kill Romano Acerbi, the leader of the largest Italian mafia group there is.
When her assignment to kill goes south, and she ends up tied to a chair in a dingy little room, Romano presents her with a choice, and one she would rather not make.