My father, a veterinarian, remarried, and I live with my stepmother and stepsister. One day, I receive an attaché case from my father, who is currently working overseas for pharmaceutical research. This is the trigger for a PTM (play in which a dick is inserted into a pussy, then the girl sucks it to clean it, and then the dick is inserted into the pussy again) series in my household. Don't miss the super lewd sex between the two as they suddenly change!