Robby isn't used to his stepsister, Kiarra's free spirited ways but when she sunbathes topless and refuses to put a top on when asked, that's the final straw. But, when Kiarra calls him on why he is so uncomfortable with her being naked, revelations are made. Robby wants Kiarra and he is unable to resist her sexy body when she begins taunting him with it. This results in a passionate afternoon encounter after both of their parents have left for the day.