Murdered millionaire's lover reveals 27-year affair

A woman who claims she was the secret lover of murdered Melbourne millionaire Herman Rockefeller, has told of her 27-year affair with her "soul mate".

The Herald Sun reportedly spoke with Liza, who lives in the outer suburbs of Melbourne, just hours after his killers pleaded guilty to his manslaughter.

"I was the love of his life," she said.

"We had a bond together no one could break apart. It was a constant friendship that we had.

"We had a long-time friendship, relationship. I'm still grappling with what has happened."

Liza reportedly was not involved in the swinger scene and only became suspicious of her lover’s double life just before his death.

The mistress also reportedly tells the Herald Sun that Mrs Rockefeller was aware of the relationship.

"Vicky was aware of it (our relationship)."

"He wasn't happy at home," she continued.

"He put up a facade of having a happy marriage. He was a pretty sad and lonely person."

The pair met at a work party and soon started seeing one another, and later travelling together.

Liza played a key part in solving Mr Rockefeller's mysterious disappearance. When she realised text messages she had received from a Sydney man might hold clues, she went to the police.

Slowly her lover's secret life was exposed.

Double life of a millionaire

To most who knew him, Herman Rockefeller was a respectable multimillionaire company director.

A highly intelligent father-of-two who was involved with the local church.

Mr Rockefeller, a Harvard graduate, was a fitness fanatic who would run 15km a day and lived in a mortgage-free mansion in East Malvern.

He had held senior business positions with companies including the Pratt family's Visy empire.

But there was another side to Mr Rockefeller, which he kept secret from even his closest friends and family.

It involved secret phones, aliases and sex. And it cost him his life.

Using the name Andy Kingston as an alias, Rockefeller placed an ad in a swingers magazine.

It was answered by Bernadette Denny, who picked up the magazine at a Sexyland store.

Denny thought their initial contact sounded promising, with Andy Kingston telling her he and his wife were regular swingers.

"He was saying how they - they swing, him and his partner swing. That she likes to do it - you know, she likes - she's more into the threesome, but she's willing to try the foursome," she said.

"He sounded like he'd done it all before."

They met for the first time in December when he went to her Hadfield home and they had sex while her partner Mario Schembri watched.

In mid-January Rockefeller travelled to Sydney for business.

While there, he used a secret phone to call Denny and wrote down her address beside his sudoku puzzle in a newspaper.

He also called his family to tell them his plane home to Melbourne had been delayed.

"This is completely out of character for Herman," his wife said in a statement to police the day after he disappeared.

"I mean he's not even the kind of person who would go for a drink on the way home."

Mr Rockefeller had hoped to do much more than have a drink when he arrived at Denny's home near Melbourne Airport.

But when he didn't bring his wife for the tryst, he argued with Schembri and Denny and ended up fatally bashed.

In an act that caused his girlfriend to vomit, Schembri then dismembered Mr Rockefeller's body using a chainsaw and burnt his remains.

Eight days after his fateful move to meet up with Schembri and Denny, his remains were found in a junk-strewn backyard in Glenroy, on the other side of town and a world away from leafy East Malvern.

On Monday, the pair pleaded guilty to manslaughter in the Melbourne Magistrates Court after earlier murder charges were withdrawn.

Schembri partly covered his face with his hand as he sat in the dock, occasionally trying to make eye contact with Denny, while her eyes remained fixed on the Magistrate.

The pair did not apply for bail and will face the Supreme Court later this month.