This was Nancy Thayer's first novel, 30 years ago. I would recommend it to any woman and to any man who wants to understand women.
The story begins when Zelda has 2 young children & is living in Finland due to her husband's work, He's a bit older than she & well-known in his profession, while she had been teaching part-time at the same college in New England. So of course she quit her job & moved them to Finland. She fills the time, when the kids aren't tugging at her by filling little notebooks with the details of her married life.
She'd begun her marriage with no desire to have children, but after awhile got to the point where she insisted upon motherhood, so her husband agreed. They both love the kids, but she needs some relief, hard to get when they're in a country where they don't speak the language & her income has stopped. Her husband puts in long hours & has numerous lecture tours throughout Europe that she'd want to join if it weren't for the children,
Added to the mix is the fact that her former boss wants them to end their marriages to be together, She's flattered, but isn't sure which man she prefers. Her thoughts about the choice don't include much at all about how her children would be affected, though she has seen how her husband's previous divorce has affected his 2 children from that marriage. The first wife had been out to get him, no matter the cost to her children but even a civilized divorce leaves a child divided at times,
We know, since she's looking back, that the relationship she has with her step-children is pretty good. So when we read about the bad times, we know it gets better. Another reviewer has mentioned some of the initial problems. Then after a lull when things are relatively ok, the girls become teenagers. To add to that, Zelda gets pregnant & the girls don't learn of it until they arrive for a long stay. Not surprisingly [except to Zelda & her husband] they feel threatened. If you're ever in her position, make sure your husband talks with his daughters before they see you.
So get a copy, Maybe if there's enough demand, it'll be put on Kindle.