Demon’s Heart by Piper Fox

Skylar didn’t want to go down the same path as her sorority sisters, but a demon had other plans.
She has a terrible secret that no one knows about.
The demon Aremis makes her an offer she can’t refuse.
But the offer has strings if she doesn’t mate with him, millions of people will die. What choice does she have?
Only she didn’t count on losing her heart.
The final battle between good and evil is here.
Their enemies are throwing curve balls and only true love can withstand their plans.