Rock, Saber, Scissors by Dawn Dugle

Celia Saber Cruz looks perfect on the outside, but appearances can be deceiving. Her adult sons keep getting into messes and expecting her to clean it up. Her ex-husband is demanding more money from her, even though he traded her in for a younger model – and stole their money. And Celia keeps running into her smokin’ hot, sweaty summer fling, who happens to work closely with her brother.
Flint Mendota would like nothing more than to fling again with Celia, but she won’t even consider it. Then, Celia’s ex is murdered, and she becomes the prime suspect. Flint flexes his investigative muscles to help Celia prove her innocence.
One crazy road trip later, Flint is this much closer to a second chance at romance with Celia. But they’ll have to defy their families and shine a light on the past before decades of secrets, and a killer, tear them apart.