Hot As Hell by Vivian Wood

To set a fire, you need a spark.
Lily and Cade always had one, but her brother — Cade’s best friend — kept the tinder damp. Besides, Cade’s a manwhore. When a man is that hot, someone’s always going to get burned. Lily should have learned her lesson the first time she touched fire, when he left town the morning after they finally hooked up.
Yet all these years later, the ember’s still smoldering.

She’s working at the local bakery, in control of the heat… until he walks back into her life. Fresh from the wildfires of Montana, Cade’s lost everything he held dear, and the losses left scars. They soon find that more than ever, they are better together. Their love grows, quick and hot.
Despite what her brother might say, Cade needs what Lily gives him. But there’s no such thing as a controlled burn.
And every secret carries the risk of a backdraft.