Your father and your new Step Mother recently married, and now they're on their honeymoon, travelling the world. Your Step Mother has a daughter, named Isabelle, who is really bratty towards you for some reason, but you don't mind. As your father and step mom leave, they both leave you with Isabelle, who's been acting weird since they left, being really flirty, leaving her underwear out, and also walking around the house with just her underwear on.