An after-work walk to clear her mind was what Mallory Kerrigan intended, but spotting Caitlyn Goodwin on the river trail interrupts her plans. At work she had watched as a distraught Caitlyn signed over the deed of her house to her ex-husband. Caitlyn's finances are none of Mallory's business, but she strikes up a conversation anyway.

Their long conversation begins a friendship and their compatibility leads the divorced Mallory to propose that Caitlyn and her son move in with Mallory and her two kids to share expenses. It seems an ideal arrangement—except to Zoe, who is no happier about sharing her house than she is about her parents' divorce.

But life is full of surprises...