Getting a Little Familiar with My Step Sister

Tiffany and her stepcousin, Nicky, are hanging out and she gets news that her vaginal and oral swabs have been received by 23 In Me, a company that maps genetics.  She is excited to get her results to see exactly where she stands in the stepfam.  Since they are already VERY FAMiliar, her stepcousin suggests that he eat her out instead of cooking, and she's eager to strip off her jean shorts to comply.  Her stepcousin is very thorough in his fingering and pussy eating, and makes her cum hard, so she takes out his hard cock to return the favor, but they are interrupted by his step-parents coming home, so they quickly get dressed and seated so as not to look suspicious...