SOLVED. Children's book about a disturbed adopted sister from Vietnam. [s]

[Stephanie]

This is the second book from my childhood that I can not find or recall the exact title of.It was written sometime in the 80s.It was a large but slim hardcover book.It was about a girl whose parents adopted a girl from an orphanage in Vietnam a few years after the war ended.The adoptee had lost her entire family and seen horrible things so she was mute.Would not show any feelings or talk to any of the family.The original daughter in the family was a talented ballerina and tried extra hard to help her new sister.Nothing worked and at the end of the book the ballerina was so frustrated that she started banging her head against the wall The adopted sister started laughing and the ballerina sister ended the book feeling happy and relieved that even a small breakthrough had been made and felt there was hope for the future for the adopted girl to become a real sister .Any of this sound famiiar?

Thank you.

[Ayshe]

Miracle of Time: Adopting a Sister?

[Stephanie]

I think this very well might be it.Thank you so,so much.Never thought I would find this again.Another childhood mystery solved.Thanks again! I cannot wait to reread it.