Is say misbehaving but it's more being cheeky/answering back ALOT. She argues over everything. She lashes out at her younger sister. She's sometimes called me stupid and literally shouts in my face if i ask her do something she doesn't want to do. For example today I asked her to tidy her room just for 10 mins as you could barely see the floor. She started shouting at me saying she didn't want to etc. If she does it she gets her pocket money if she doesn't she gets nothing and she doesn't seem to care. Because of the way she's spoken to me she has also lost her time on the tablet later on too. How can I deal with this? I don't understand why she seems to have gotten so angry. She isn't like this at school or her clubs etc just at home.