You Can't Fall for Your Step-sister — Ann Bryant

In "You Can't Fall for Your Stepsister", volume 2 of the "Step-Chain" series, we meet Ollie, who has mixed feelings about the upcoming beach vacation with his mom, brother, and stepfamily. While he's looking forward to the sun and surf, he can't ignore his growing feelings for Frankie, his stepsister. Only after a trial by water does Ollie recognize that even with the word "step" in front, family is family.