The Successful Chimera {Josh Diaz}

Malia Tate had lost both her mother and her sister due to a car accident, since then she wasn't able to drive because of it.
But when Theo Raeken starts talking about a new chimera and says that it will be a huge surprise to Malia, she starts to investigate.
Who is the new chimera?
Did Malia know her?
Could it be her mom or sister?