Hello I am hoping for some advice. My eldest daughter who is 9 is horrid to her younger sister - she is 7. She calls her a weirdo, shouts at her, will rarely play with her and is just horrid. I heard her shouting at her at bedtime so went up to tell her off - my younger daughter was sobbing her heart out. I told my eldest that she was a bully and I would not tolerate this behaviour. I took her laptop off her and came downstairs. My younger daughter then came down saying madam has the house phone and is trying to ring childline or the police. I went up and told her to give me the phone and tried to make her see that she really upsets her younger sister. She told me to leave the room. She said I'm not apologising you need to apologise to me !! Im worried her rude behavious and general back chat will get worse..how do I deal with her . She is very well behaved at school but it's me she seems to have the problem with - she has told me a few times I'm a terrible mother 😞..and has a general attitude..she added back and is always pushing boundaries...any suggestions x