<s>[INST] A 10-year-old boy has never spoken and was recently diagnosed with autism. His 6-year-old sister does not know how she feels about this. She was very upset when she found out that her brother was autistic. She does not like it when he screams and hits her. She does not know how to react to him and feels sad and frustrated. What would you recommend to the parents of these two children?[/INST]