We Are Water by Wally Lamb

After 27 years of marriage and three children, Anna Oh --- wife, mother, outsider artist --- has fallen in love with Viveca, the wealthy Manhattan art dealer who orchestrated her success. They plan to wed in the Oh family’s hometown of Three Rivers in Connecticut. But the wedding provokes some very mixed reactions and opens a Pandora’s Box of toxic secrets --- dark and painful truths that have festered below the surface of the Ohs’ lives.