Rolf Harris has told Southwark Crown Court he asked one of his alleged victims for forgiveness after feeling he had "let her down."
He claimed they had an affair which was consensual but he said that when his family found out, "I felt that I had betrayed everybody ... betrayed their trust."
The court heard the woman threatened to go to the papers unless he gave her £25,000.
Her father later wrote a letter to Harris confronting him about the alleged abuse but Harris said he burnt it.
Harris denies all the charges against him.
More top news
Bradford City co-chairman Mark Lawn has blasted TV broadcasters over their FA Cup fifth round match choices
Face to face with 2 tons of unpredictable muscle is an awe-inspiring moment but within a few years it will be impossible, they will be gone.
A cat in Florida clawed his way out of his grave after his owner buried him believing him to be dead following a car accident.