The one who is perfect

One day I was walking along the street and comes along a family of 2 girls, one was 8 years old and the other was 13 years old, there name were Casey and Zali. Zali wanted a scooter and her mum said no pit them Casey asked for a iPhone 5s and her mum unfortunately said yes so Zali said 'why does Casey get everything and I don't' so Zail storms off crying she couldn't stop crying for 10mins so her mum came over and said 'stop whinging ok it's just a phone you can get one when your older' Zali still keeps on crying saying 'but Casey gets her own way every time and I don't is that just because I'm the youngest why don't you tell me'.
The next day Casey and Zali went off to school walking together at recess Casey got in a fight at school so the deputy pulled her up to the office but didn't call the other girl cause apparently it was Casey fault, that day they ring Casey's mum and says we have suspended your child for 5days and Casey's mum said 'what for' they said 'because she punched her.