Ahhhhh I'm done. She's 16 years old. She cares about no one else but herself. She won't help anyone when her help is required all she cares about is make up and boys. I've had it, it's such a load of bullshit when people say "it's just the age she'll get over it" that's a FUCKEN lie. My parents almost separated because of how my parents parenting affected my sister behaviour. My mum is an amazing woman, very respectful,kind hearted,caring, sensitive. All my mum asks from my sister is respect and to help out once in a while, without the attitude. My dad, he's like a big kid, he doesn't care about parenting he has no rules no barriers against my sister. This is why they almost got separated. My sister is and has always been close with my dad, because he gives in and gets her literally anything she wants and my mum is the opposite, she won't get you anything unless it's necessary. It's not only about things it's about love,respect they way she treats my parents is gobsmacking! Your 16 years of you don't like the rules that are set then leave this house and go with some other family. The same rules that have been set for my sisters have been set for me, the only difference was I respected them and when the answer was no I understood it and never went above and beyond, unlike my sister who thinks she could rule the world and claim that we're her servants. Of course everything I'm saying on here I've never said to her face but I just need your options on what type of action should be taken. So inconclusion how can I assistance in bettering my sister behaviour?