Jacqueline Wilson - The worst thing about my sister

Being a sister isn't always easy . . . but what's the very worst thing about your sister?

Marty and her sister Melissa couldn't be more different.

Marty loves her Converse trainers, playing football, hiding in her secret den and helping her dad with his DIY. But Melissa loves Justin Bieber and all things pink, girly and pretty.

The sisters can manage to live together, despite their occasional scraps but then Mum tells them they have to share a room.