Notice it

When she woke up, everything was different. The houses, the streets and even the people were different and irracional - the houses were small and cosy, the streets and avenues were calm and quiet. The buses... well, the buses were the same buses. But the people, were completly different.

'Sarah, what's happening?' her mother asked, after watching her staring at the breakfast on the table.
'The breakfast...' she whispers 'It is different.'
'Of course is different, I fired Maria. She had no skills.'
'Who's Maria?'
'Who was Maria? Our stupid maid.' her mother gasped 'The maid I fired.'
'Why did you do that?'
'Haven't you told me your car keys were missing? Well... I found them in her room.'
'My keys? My car?'
'What happened with you? Are you ok? Dress up and hurry up, you're already late for school.'