Who is Jessica as noted in the memoir, All You Can Ever Know?

Jessica is Chung and Cindy’s older half-sister. Although she is not seen extensively throughout the book, she maintains a good relationship with Cindy and treated Chung kindly as well. She lives with Chung’s birth mother and is the only one in the family who remains in contact with her, often defending her mother and explaining that she had a difficult and disappointing life.