Dear mam, Children are extremely sensitive yet intelligent individuals. They understand and also get affected by averse behavior of others. They have a fragile self respect. As a parent, you have to treat both daughters equally. Teach your elder daughter to give equal respect to everyone, even her younger sibling. And teach your younger daughter to assert herself in front of others. Pls be careful that your elder daughter is not jealous or insecure because of younger daughter because the age gap is more. You will have to handle it tactfully.

The kid doesn't require any counselling.  It's the parents who should know the reason for that. Hence if as parents they consult a Counsellor or a Psychologist and talk to them various situations and even ends in which she behaves, like that . Maybe they can get an Idea how to manage her after that.

hi, your daughter seems to have some issues with family (immediate or distant). do not scold her rather ask her politely about her issues. if need be take her to a psychologist in your area. take care.

She seems to be troubled by something. Since her behavior is normal at school and her anger is directed only towards family members, it appears that she is having some issues with others in the family. Don't panic, just show your love and concern towards her as ask her if she has any complaints. Being helpful and considerate without being judgemental may help her express her feelings.