Help!! I can’t remember the title !!!

[Mimi]

Hello, I’m Mimi. This summer I am revisiting previous Reads. There is one book I cannot remember the book title or the author—could be Linda Howard, maybe not. The book is ten to twenty years old. Definitely in the romance suspense category
Plot: Mistress of Mafia King type is used as a pawn to secure services of an assassin. After she complies and is seduced by the assassin, who is actually an undercover agent, she devises and executes her escape plan. But she is a potential witness and the assassin/agent needs to find her and protect her. The chase is on.
Does anyone remember this?
Thank you

[Tracy]

The book is Death Angel and it is by Linda Howard.

[Mimi]

Thank you so much!!!

[Mimi]

I found it! And it was as good as I remember. Thanks again!!