On Tuesday, Young testified that he and his wife were "scared to death" as they accepted checks as large as $150,000 marked as payment for furniture when the money was really meant to help hide Edwards' affair with Hunter.
The money came from Rachel "Bunny" Mellon, a wealthy philanthropist who made the personal checks out to her friend and interior decorator. The friend, Bryan Huffman, would co-sign checks with Cheri Young in her maiden name, he said. Young said his wife would then deposit the checks into their own account.
Young said that Edwards insisted that it was not illegal and that no one was going to get in trouble.
In June 2008, Young said today, his requests to Mellon for money escalated with a plea for help in setting up a poverty foundation with up to $40 million. He said that she got very upset, accusing him and Edwards of using her for her money.
Young said that when he told Edwards of Mellon's reaction, Edwards laughed.
"He said, 'The good news is it's doable,'" Young said. "He said, 'I will calm Mrs. Mellon.'"
The former aide also testified today that Baron, who was being treated for cancer at the Mayo Clinic, had gotten very angry after Young told him that the National Enquirer had caught Edwards visiting Hunter at the Beverly Hills Hilton Hotel in July 2008.
"He started cussing Mr. Edwards out," Young said. "[He said:] 'What the f--k was he thinking? He's ruined everything we've worked for.'"
In August, Edwards admitted in an ABC News interview that he'd had an extramarital affair, but said that he was not the father of Hunter's baby. Young said today that he didn't think the interview was a good idea at the time but that he'd told Edwards, "Tell the whole truth or don't do anything at all."
Young said after the interview -- during which Edwards also said he didn't know whether Young was the father -- he was extremely angry. "I didn't understand why Mr. Edwards didn't clear my name," Young said.
ABC News' Alice Maggin contributed to this report