Wass asked: "So the whole thing is effectively staged?"
Bindi replied: "No, it's just I want to be there for my mum and dad and I want to be seen to be."
For the most part Alwen, who relies heavily on her husband for support after hip surgery, looked as if she was in a world of her own as the evidence against her husband unfolded.
A public show of support for Harris from his daughter may have been motivated by her desire to discover whether she would inherit the entertainer's 11 million ($21.5 million) fortune, prosecutors allege.
She has described inheriting the money as "winning the lottery". Prosecutors produced an email, sent from Bindi Nicholls to her father less than two years ago, in which she told of her money problems and asked him: "I understand that I am sole inheritor of your estate - is this true?"
Harris could now face a string of compensation claims from his victims. However, recent reports suggest that he may have taken steps to move assets out of his name, diminishing his apparent wealth.
Nicholls, 50, admitted during the trial that her relationship with Harris was deeply fractured, with his behaviour at home at variance with his lively public persona. She said: "Dad didn't really take much notice of me or anybody at home." She described how he "switched off" when the television cameras stopped rolling, preferring to work quietly alone rather than spend time with his family.
When she came to give evidence at the trial, Nicholls turned on a former friend who was the main prosecution witness. Nicholls defended her father and described claims that he had abused her friend from the age of 13 as laughable. Nicholls also dismissed suggestions that the victim had developed an alcohol problem as a teenager as a result of the abuse.
It was put to Nicholls in court that she was financially dependent on her father and was colluding with him to back up his evidence - an allegation that she denied. She said of giving evidence: "This isn't about me helping my father. This is about telling the truth."