For years, Deanna's eccentric grandmother has been trying to marry her off to a rich man, and she's finally managed to do it. Deanna has spent her life trying to take care of those she loves, and a six-month marriage should be a simple enough way to keep their historic Savannah house from falling down around their heads. Sexy, obnoxious Mitchell Graves needs a wife to finalize a business deal, and he snaps up Deanna as the most expedient option. Because she's quiet, he thinks she'll be easy enough to manage as a wife. He couldn't be more wrong.

For more than two years, Rose has been the nanny for James Harwood's daughters. She adores the girls, but she tries to maintain a professional distance with James—no matter how attractive she finds him. However, when his engagement falls apart and he starts to look at her differently, Rose no longer sees him only as her boss. James isn't the kind of man to fall for his nanny, so he doesn't know why he can't stop thinking about her in very wrong ways. He's determined to resist, to keep his life simple and to find an appropriate substitute for his wife who died. But with a manipulative ex-fiancée, two precocious daughters, Rose's interfering Southern grandmother, a short-lived fake engagement, and feelings that won't be denied, nothing remains simple for long.

Kelly has spent her life taking care of her grandmother and being responsible, but she decides to have a little fun for one weekend in Vegas. She doesn't expect to wake up married to her best friend, Peter—and not remember anything about it. Peter has been in love with Kelly for a long time, but she's never looked at him as anything but a friend. He's thrilled when she seems to want him for a husband—until he finds out she didn't know what she was doing. Not wanting to let her go, he convinces her to stay married to him for a month and a half to appease their traditional families. Now he has only forty-five days to prove to her that they should stay married for good.