It's not a thriller.
Imagine that line as spoken by Arnold Schwarzenegger to his class in Kindergarten Cop. I start here because I saw a review saying what a disappointing thriller it was, and it would be disappointing if that was what Moriarty were shooting for. It's also not a romance, or a mystery, or a literary novel, although it does share some elements with those.
What it is is a book about regular middle class suburban couples who experience a trauma together, and how it affects their lives thereafter. It's not a big trauma, it's not newsworthy, but it affects them all, and their little kids, too. And because the author takes her work seriously, there is much more to it than just that, humor, and backstory, and a way through, and a future.
I love books like this about living in after some bad thing. Fairy tales are important because they teach us that the witch or the monster can be killed, these books (and I hope someone has a short, catchy name for the genre that isn't sexist, because I sure don't) these books demonstrate how to live through the bad things and still have a good life. I don't believe stories about people living through horrible events and being stoic and saintly and a good example. Pain doesn't make people stronger or better, it makes us angry, and short-tempered, and hell to get along with. And of course, we all have pain and most of it is garden-variety common and of no interest to others. And the older we get the more time we spend attending funerals, the more people we have to lose. These books remind us that we can still laugh at the wake, that there are many ways to comfort one another in our loss.
I'm on my way to a funeral soon