Wicked Grace by Luna Joya

He’s a grumpy demon prince. She’s a sunshine magical orphan who’s his fated mate and forbidden. But can he survive rejecting her?

Demon prince Alexei is ruthless in business and deadly in battle. The mafia boss will do anything to protect his family, even consider an arranged marriage with a royal he doesn’t love.
There’s just one problem.
When the grumpy hero rescues a sunshine princess locked away in a tower, he knows she’s his fated mate. She also seems to be a freakin’ forbidden angel. Like the villain he is, Alexei rejects her without saying why.
Despite her tortuous childhood, Jolene is determined to find her real family and win her grumpy prince. Come on—the man has wings! But loving her antihero makes him a target of her human enemies who are out to destroy all supernaturals.

These two opposites attract in all the wicked ways. But when supernatural children in Alexei’s hometown start disappearing, the two must work together, and Jolene will have to reveal that her sunshine-and-sparkles magic isn’t what it seems. Can they find their happily ever after or will their differences and enemies destroy them both?