Darkness Calling — Laurie Olerich

ad infinitum: endlessly, forever, without limit Finally freed from a century in purgatory, former-wild child Aisling just wants to raise her son and live as a normal human again. Her taste of freedom is cut short the moment her past comes to claim her. There's one reason she was exiled, and his name is Cain. With him, there was only darkness, and the angels help her, she liked it that way. Now he's back, and his commands are simple. Stay away from Sean or else. But when he threatens to take her son, she turns to the one man who can save them both. Sean. Sean is sick and tired of his baby mama's hateful attitude. Her mood swings give him whiplash, and he's seriously thinking of strangling her. But when a brutal old enemy shows up to destroy everyone Sean loves, he discovers Aisling is hiding more than her feelings for him. When the ice finally thaws, he's stunned to realize how she calls to the darkness within him. Joining forces to protect their son, Sean and Aisling set out on a journey that leads them from the city streets of Manhattan to the elegant hotels of Vienna to the final terrifying showdown in the bowels of Rome.