This is one of those novels that should have been a short story. Fun fact: this was a short story originally! And it should have stayed that way, unfortunately.
There is only one interesting thing here, the gimmick of the parallel universes of cheating or not-cheating. One is Cora's actual life and the other is what she imagines if she'd made the opposite choice. And this is a nice little gimmick because, of course, the fantasy is always the one that is exciting and the real life is always less dramatic, more mundane. But this point is made quite early on. It gets only one little twist partway through, which was perfectly nice, but doesn't deserve a novel. Would have been a nice punchy story, but we simply did not need all these pages.
This was, to be honest, a hate read for me. I picked it up feeling optimistic because Big Swiss and Acts of Service are two of my favorite books of the last few years and I was so happy to hear those comps. But the big blurb--"the best book about adultery since Madame Bovary"--feels like a joke. Is it a joke? Is it actually serious? I don't know, but as my optimism curdled, that blurb is what turned this into a hate read. This??? I kept thinking, this is your best novel in the last 100 years about adultery??? It's just boring. It's a boring book with boring characters. Cora is deeply uninteresting. Sam is also uninteresting. He is, apparently, kind of hot, so at least there's that so we can understand the attraction. And Cora's husband seems pretty terrible so you can't really blame her. But I still don't really know anything about who Cora is. It seems like you could insert basically any blank millennial in there. She doesn't seem to care about anything or do anything or want anything, besides Sam.
The parenting in this book also made me feel like I was losing my mind. Cora and her husband Eliot don't seem to like their kids and they certainly don't seem to parent them. They talk in front of them without considering that what they're saying isn't appropriate for the kids to hear. They ignore the kids. They placate the kids. The kids are very much the kids of novels where they are able to "go play" whenever we need things to happen amongst the adults but then they create problems whenever the plot needs a push or a few characters need to be put in an uncomfortable situation. I was at least gratified that their kids turn out even more annoying than their parents, serves you right, Cora.
At the end of the day, it isn't even a good novel. Not to mention a good adultery novel. Cora and Eliot seem to think they have these really difficult lives but actually they have things pretty good. They don't have any real problems, but they have the kind of fake problems that books like this have. Like oh no, poor Cora and Eliot, your house is old. But they own a house! They have jobs, they have appropriate parental leave, they have childcare and health insurance, they have community around them that is available when needed, and friends who will watch their kids. Is the point that they have these great lives and can't see them because their lives are passionless? Or are their lives supposed to be bad and dismal? I honestly could not tell you. I can tell that Somers wanted to be funny here, but it never worked for me. Her previous novel I didn't find funny, either. So I think it's official that I won't be reading any more of her work.