What is the main conflict in Bitter Fruit by Achmat Dangor?

Bitter Fruit is the story of a family trying to come to grips with the past. Living in post-apartheid South Africa, one day Silas Ali comes face-to-face with the man, Du Boise, who raped his wife Lydia nearly twenty years ago. This encounter throws the Ali family into a downward spiral as each member tries to come to terms with what happened.