Because he never gives her money for clothes.
Because he's never home.
Because he doesn't want to provide for the family.
Because he treats her mother badly.
Because he said he'll miss her a lot.
Because he was scared she'll get kidnapped.
Because he had no money for the trip.
Because she needed to stay and help the family business over the summer.
She learned the true value of life.
She was relieved to be back home from poverty.
She learnt nothing about true values.
She became even worse than before.