Playing with Fire by Tamara Morgan

Fiona Nelson has always been one hot ticket—even before she took the conversion serum that gave her superhuman abilities. Fionas powers come at a price: lack of human contact, or she wont be the only thing burning. When she loses control of her emotions, her fire powers run rampant...and shes hurt enough people already. 

Including herself.

But when the man behind her conversion returns to blackmail her into helping him gain power, the only person she can turn to is Ian Jones, the man who broke her teenage heart. The man determined to expose the criminal known as Fireball, whose explosive escapades are just a little too close to Fionas M.O.

Ian is convinced Fionas dangerous, convinced shes Fireball, and convinced hell damn himself if he doesnt resist a heat thats always drawn him to Fiona like a moth to a flame—but Ian has his own secrets.

And hell learn far too soon what happens when you play with fire.