Summer on Firefly Lake by Jen Gilroy
All Mia Gibbs ever wanted was to have a family, but when her husband runs away with another woman, she suddenly finds herself a single mom. Raising two daughters alone isn't easy, but her girls are her world and she's determined to stand on her own two feet. So when a childhood friend offers her a job helping his mom downsize her home, she jumps at the chance.
The last thing Nick McGuire wants now is a family. Once upon a time, he and his wife were happy and trying to start a family of their own. But years of infertility and the fighting that resulted ripped them apart. Now his job is his life, and he's perfectly fine with that--thank you very much. At least until the beautiful Mia Gibbs--and her two rambunctious girls--come back into his life.
The more time Mia and Nick spend together, the stronger their attraction grows. But they've both been burned before. Can they find the courage to take a second chance on lasting love?