Your sister is now a bad person, she like to smoke, making a trouble in the street, caring less on you, hating you, and she even tattoed herself arround her body, coloring her hair, and put many piercing too. The reason is because your guys parents death, she become like this because how depressed she was. She letting it out by changing herself into like this bad thing. She smoking everytime, she make the house become more dirtier and messier by throwing the trash ob the house. She lazy now