The Lullaby Sky by Carolyn Brown

After seven years of misery and abuse, it's all over—Hannah O'Malley is officially divorced. Hallelujah. It's like every Christmas in her life all rolled up into one glorious day. Not only does Hannah get to keep her grandmother's spacious old house, but she has full custody of her sparky five-year-old daughter. All Hannah has to do now is put the past behind her.
And now that she's free, she wants to make a difference. With the help of her warm, close-knit circle of friends—including her high school crush, Travis Wilson—Hannah begins turning her home into a safe house for other women who've endured the pain she's known. But even as life and laughter return to Hannah's home, she's haunted by the memory of her dangerously unstable ex. With a second chance at love on the horizon, Hannah must face down her past in order to let the sunshine back into her life.