Reading story book herself

Last night first time i noticed her reading the story book herself.........i mean reading, as making her own sound and flip one page to another.

Yesterday too, she learnt about "happy birthday" song and she could sing herself afterwards.

She is the little princess that must possess everything including me her mum, and can't be shared with her sister. When I scolded her, she would keep quiet and bowed her head and her eyes looking at me.