Why do Dukes Say I do? by Manda Collins

Image linked from Goodreads

Isabella, her sister, Perdita, and their friend Georgie have formed a friendship based on the fact that they were all abused wives. With Isabella's husband being gone, she is enjoying her society lifestyle. For the most part. There are these annoying anonymous letters... and somebody might be trying to kill her. But that just seems silly. Why would anyone want to do that? 
Now her godmother, the grandmother of Perdita's husband, is blackmailing her into going to the country to bring back a reluctant duke (in fact, the man taking over after Perdita's husband passed away). While there, Isabela may learn a little bit more about herself as well as discovering that not all men are controlling bastards.
An okay story but I really had to slog through it. Neither Isabella nor Trevor was a compelling character. I was mostly reading to find out how MC was going to tie in the "I know what you did last season" to the movie.

Books after this one: Why Earls Fall in Love, Why Lords Lose their Hearts