Think about how you talk to your child!
Is it always:
No you can't do that!
No don't hit your sister!
Because I said so!
Stop and reset your words and motive!
You really want to build connection with your child.
So instead of TELLING your child what they need to do,
try ASKING your child.
You will open conversation, build relationship, and enable trust and respect to develop.
Give it a go, and let me know what you are noticing and how your child's behavior changes!