Reminding step sister what fun is
Your step-sister is a bookworm. Like all eminent girls, she always hunch over her boring studies, forgetting what real fun is, despite the fact that you already showed her how to relax. But now that your parents are away, it is time to refresh her memory and seduce her for sensual fun. Sure, her mind will say no, but you can make sure that her vagina says otherwise.
