I can't take it!!! >:(

I can't take it anymore!!!! Seeing my younger sister who is like 10 years younger getting beaten by my mum! Just because she doesn't want to practice the piano. >_< I understand that we have to practice. But playing an instrument is to have fun and loving it. Not playing it by force! >:O When i was young,my mum treated me very well. Not like my sister who gets beating so often. At that time when i was the same age as her,my mum never shout or beat me! >:/  And she expects a 3 year old young girl to be a genius!?!?! That's ridiculous! It takes time to learn! It's not like you have to straight away know it! >_<" I wish my mum would realise her wrong! Piano is to have fun with not to be forced to play!