Deliverance by Michaela Jackson

Just one night of pure, indulgent pleasure.
That’s all I wanted before starting my new job as a personal assistant to a billionaire heir.
But when I arrive on the first day, I realize that the cocky and arrogant guy I left in bed is none other than my new boss, Creed.
I should stay away from him—he’s ten years younger than me and exactly the kind of man I’ve sworn off after a disastrous marriage. But as we become increasingly entangled in each other’s lives, I can’t help but wonder if Creed might be the distraction I need from my own shambled life.
But I have secrets—three of them, to be exact.
First, I suspect that Creed might be my stepbrother, raised by the mother I never knew.
Second, I used to be a Mafia princess.
And third, I’m hiding from my ex-husband after stealing five million dollars and threatening to bring down his empire.
My life was always destined to be a tragedy, but I never imagined I’d find myself falling for the one person who could either deliver me or doom me. Can I risk everything for love, or will my secrets destroy any chance of a future with Creed?

This is a standalone romance with a happily ever after. It is part of a broader universe of novels, but those do not have to be read to enjoy this one.
Tropes: Age-Gap (Older woman/younger man), Boss, Secret Mafia Princess, Step siblings, Single Father