Hidden Truths (Fortune's Daughters Trilogy) (Fortune's Daughters Trilogy #2)
Muna Shehadi

Eve Moore is in a rut - stuck in a steady, predictable relationship, and a job where she's no longer challenged. Furthermore, she and her sisters are still reeling from their recent discovery, years after their famous movie star mother's death, that Jillian Croft could never have given birth to any of her daughters.
Embracing new horizons doesn't come naturally, but when the chance falls into Eve's lap to strike out on her own and test her architectural design skills, she sees it as the perfect opportunity for change - one that turns out to be further-reaching than she could have imagined.
Planning to lose herself in work on Washington Island, Eve keeps stumbling into unexpected and complicated secrets. But she also begins to forge close emotional connections to her new acquaintances, and discovers that by bringing another family back together, she might be able to heal her own long-concealed heartache, and step into the future she chooses - on her own terms.
You can read more about fascinating Jillian Croft in the other novels in of the Fortune's Daughters trilogy: Look for Rosalind's story in Private Lies and Olivia's story in Honest Secrets.