The Wise Women by Gina Sorell

When Clementine finds out that her husband, Steve, took the money she thought was for house payments and used it to help his start-up business (AquaVeg), she kicks him out. Clementine has enough to worry about with their young son Jonah's anxiety--and now she has to possibly find a new place for them to live. Meanwhile, her older sister, Barb, suspects her girlfriend, Jill, is cheating on her, while Barb is trying to stay at the top of her field as an architect in Brooklyn. Although Clementine and Barb are close, they haven't seen their mother, Wendy, a well-known advice columnist, in a while. Wendy has actually lost her job at the magazine she worked for, has moved to Florida and married her boyfriend, Harvey, without telling either of her daughters. Wendy, bored in forced retirement, senses that Clementine and Barb need her and travels back to New York to make things right and mend her relationships with both her daughters.