The Castaways Elin Hilderbrand

The Castaways is a story about a group of married couples who are all great friends. They take trips together and their kids play with one another. But tragedy strikes the group and they all have to come together to get past the "tragedy" as things unravel and fall apart. There's lots of scandal, cheating, make-ups, break-ups. All sorts of twists and turns. Great summer read! I couldn't put it down once I got to the middle.