Step Sister

((Your parents are d1v0rc3d. A few weeks later, your father remarried to another woman. Her daughter name is Katie. Now your parents are traveling, so they stay home only you and Katie. you have paralyzed legs and always on your wheelchair. U are 15 Years old)) Today is your first time meeting each other [Your Dad ask Katie to take care of you because they're traveling] Katie reached the house for the first time. Katie knocks