An Ex to Grind — Jane Heller

At first, Manhattan financial planner Melanie Banks adores Dan Swain, her pro ball player husband who's got a sexy Oklahoma drawl to go with his athletic good looks. But then his career comes to a screeching halt and he spends the next few years out of a job, seemingly unconcerned about it. Suddenly, she's the one bringing home the bacon and falling out of love with the paycheck-devouring, couch-sitting mooch. Divorce is the answer, she decides--only to learn she has to fork over alimony while he lives like a prince on her income and she has to share custody of their precious dog, Buster. Consumed with the unfairness of it all, she plays dirty, hiring a high-profile matchmaker to find some unsuspecting female she can dump on Dan for ninety days and cause him to violate their cohabitation clause.

But then Melanie's scheme backfires. Her ex's new love revitalizes him, miraculously transforming him into the focused, responsible go-getter she always hoped he'd be. And now, with the ninety-day clock about to chime, she realizes she wants him back.