In Walked Sin by Alyna Lochlan

The Devil holds a secret that all desire to know.
Sinclair Maroso is ruthless and doesn’t have a heart. Those whispers suit him perfectly.
They call him Midas because he seems to make money with everything he touches, and maybe he does.
He owns this city and runs things his way, but the downside, everyone wants a piece of him. When in public, every head turns, and he can feel the wolves closing in.
There’s never a lack of pretty things on his arm, hoping to catch his eye or grab his heart. That organ shriveled and died a long time ago. Women ease the chill that surrounds him for an hour or two, but they never hold his attention for more than a night. Demons are a continual torment. That is, until he spotted her.
Francesca Leonelli. He can’t shake her from his thoughts. She is unlike anyone he has ever met and not his normal type with all those gorgeous curves. He wants nothing yet everything from her. Lightning strikes where his heart once beat, and lust rushes in as his controlled world tilts. She’s an obsession and he will have her.
After all, the Devil always gets what he wants.