Fire Born by Rayanne Haines

Independent, tough as nails, and fierce to her core, Alex Taleisin can’t quite believe it when she has to fight for her life against something not-quite-human in the YMCA parking lot.
That’s when her aunt lets her in on the family secret. They’re immortal—Elementals to be precise, and Alex is the long-lost daughter of the strongest female warrior of their time.
Her guardian (a freaking Dragon!) and the sexiest man Alex has ever seen gives her a choice. Go with him, learn how to control her fire, and find her father’s people, or try to survive on her own. It’s an easy choice considering she’s only twenty-six. And the Elders may already be on her trail thanks to the fight with the nut job in the parking lot kick-starting her dormant DNA.
Enter an insane grandfather, a shifter with a hidden agenda, and a witch with a shoe addiction, and suddenly loner Alex is wishing for a quiet house in the hills with the dragon she’s falling for.
But a fight is coming and Alex knows the only way to find her answers is to trust her powers and become the warrior she was destined to be.