More than six years after she disappeared, Chardon is fighting a murder charge in the Supreme Court in Brisbane.
Source: Queensland Police
On Monday, Chardon denied he demanded sexual favours from students in the Philippines in return for helping them financially.
He also denied he said they should preferably be virgins, an allegation made by a witness during the trial.
"I'm no saint but I never had a conditional thing with any of the people I sponsor," he said.
"A lot of the time I was helping some of the others, they actually offered it. This is the Philippines."
Chardon said he helped with money for housing, milk or medicine for their children.
"I used to get offered but I would knock a lot back because I am not bloody Superman but there was some, yes," he said.
Earlier, the court heard that Chardon told police that when he woke up on February 7 his wife was gone, with him suggesting she might have sold $70,000 worth of jewellery to fund her departure.
However, investigators have found Ms Chardon's passport and she hasn't used her bank accounts or social media accounts.
On Friday, crown prosecutor Mark Green put it to Chardon that his account of his wife's disappearance was fabricated and asked what he had done with her body.
"No, it's not (and) I didn't do anything with it," Chardon retorted in an at-times heated exchange.
He also denied another person had helped him dispose off the body or that he became "furious" after he received a letter from Ms Chardon's lawyers the night she disappeared.
The jury has heard Chardon had thought the couple had agreed on joint custody of their children and offered his wife a $3.5 million divorce settlement.
But the letter he received on February 6 stated Ms Chardon would provide access to the children and wanted 50 per cent of all his assets, including their Upper Coomera home, two factories and a mining investment.
Ms Chardon also wanted half the company Chardon started in 1986 with his first wife, Maureen.
The trial continues.