Complex sentence: She has said that the decision to go into acting was in response to a "horrible teacher in grade 2" who stifled her and made her withdraw; in response Prout's mother asked "what can I do to make you happy again?".
Split into simpler sentences: She has said that her decision to go into acting was in response to a "horrible teacher in grade 2" who stifled her and made her withdraw. In response, Prout's mother asked "what can I do to make you happy again?".