Devilish by Tricia Barr

Tired of Hell, the Devil has escaped his prison and come to Earth to revel in the pleasures of the light, eventually becoming somewhat of a feared celebrity.
Felicity Claire has always sought out adventure and danger. As a journalist for the New York Times, she is working on breaking a big story about a viral weapon being manufactured by a pharmaceutical company. But her plans get derailed when she is assigned to interview the Devil himself. Lucifer turns the interview into a game of seduction, and Felicity gets pulled into a world that blurs the lines between lust and love, and between good and evil. Passion, thrills and danger ménage as this story of revenge and redemption unfolds. Can you resist the original bad boy?