The Other Woman by Jordan Silver

When Wendy went after a married man and got him, she thought her life would change for the better. She had no idea that the jilted woman’s moving on would set off a string of events that would show her and the man she stole why the grass is never greener on the other side.
When Rachel lost her no-good husband to another woman, she endured the pain of betrayal like anyone else would, but it didn’t take her long to look at the bright side. What had she lost after all? A husband and father who barely spared a moment for his wife and kids? Good riddance.
She was all set to do it alone, no matter how hard it proved to be, but that was before her husband’s best friend stepped in to help her carry the load.
When Doug left his wife for his new hot girlfriend he expected her to put up a fight. He was pleasantly surprised and relieved when she let him go without too much fuss. But little did he know that things would take a drastic turn when his best friend decided to pick up his slack.
Jacob had always had a thing for Rachel. In fact, the night she met Doug, he had been the one to see her first and point her out to his friend, who made the first move. Now that Doug was out of the picture, the wealthy businessman saw no reason not to make his move.