Hosed (Happy Cat book 1)

Cassie is back home helping her sisters company, Sunshine toys ( and not the kiddie kind ;-))
We first meet them, when our hero Ryan, who´s a firefighter, arrives at Cassie´s sisters factory on fire. Ryan has been her high school crush, and unbeknown to her, she was his. But because of something, Cassie heard one night at school, she now hates him. Hate isn´t far from love, you know. And so she discovers when they start falling for each other. Cassie is trying to save her sisters company from disasters, but when she is accused of arson, Ryan has to find out where his loyalty lays.