This book contains a second-chance romance between a divorce couple, a surprise child (the husband didn't know she was pregnant when they broke up), healthy family relations between the ex sister-in-law, ex FIL, and the FMC, and depiction of the FIL suffering from cancer. If any of those things sound good to you, you might want to check this out.
The author did introduce a bit of a mystery plot in the last ten percent, but I'm not really sure how it related to the story as a whole, except that the danger allowed the couple to realise (once and for all) how much they still love one another.
To be honest, this book wasn't for me. I struggled to get through it, and ended up skim reading to finish, but just because I didn't enjoy it, doesn't mean you won't.