While Mui enjoyed a successful professional life, her family life was not as successful. She became estragned from her two older brothers after a string of failed business attempts. Tension emerged between Mui and her mother when the books of a cancer charity run by Mui's mother and supported by Mui showed accounting irregularities. The rift caused Mui to miss her mother's 77th birthday party. Mother and daughter reconciled when the death of Ann Mui Oi-Fong on April 16th, 2000 (