Children from across the world, throughout time, have always played games, pretended to be something, somewhere they're not. Everyone in their life has tried to imagine being someone other than themselves. It was common knowledge.
Ginny was good at pretending. As a little girl, only age six, she would imagine being a famous Quidditch Player, the roar of the crowd below her screaming as she, Ginny Weasley, Chaser extraordinaire, scored another goal. The years passed, and so did her dreams. At ten she would pretend she was Harry Potter's girlfriend. They would get married, a beach wedding of course, and have five kids: Harry Junior, Brittany, Courtney, Josh and Crystal. They would all have red hair and green eyes except for Harry Junior. He would look just like his dad.
In her first year her mind created a much different scene. Harry disappeared, her future husband replaced with a picture of Tom. After she stole the diary back from Harry he had shown her a picture of himself. He was the most beautiful man she had ever seen. She would do anything to be with him. Ginny loved Tom.
But here she was, six years later, married and expecting her first, correction his first heir, trying to pretend she was anywhere else then here.