Metro

Prenup rocked by family ‘affair’

The sexy Long Island mom who famously got her prenup overturned had blamed the pact for the end of her marriage — but it was really her steamy affair with her cousin’s husband that did it in, the cousin and others say.

Liz Petrakis, 39, of tony Old Brookville — who recently won the landmark prenup ruling against her millionaire real-estate-mogul hubby — took up with Steve Houraney, the husband of her cousin Alisa Houraney, in 2007, Alisa told The Post.

“I want people to know the truth. The prenup didn’t break up her marriage — she did,” said Alisa, 34.

The cousin added that once the affair became known, Petrakis “called a meeting of her and my family and admitted everything.

“Liz said, ‘Steve and I are in love, and you’re going to have to get over it,’ ” Alisa Houraney recalled.

“I felt I got punked by Ashton Kutcher. It was like a bad dream. I said, ‘Get over it? Get out of my house!’

“I don’t know why my cousin would ever do this to me,” she said. “It was very hurtful . . . It was a betrayal. She destroyed two families and all the kids.”

Alisa Houraney said Petrakis had bedded her husband — the best friend of Petrakis’ own husband, Peter — when the Houraneys were still newlyweds.

Alisa said Liz had been her maid of honor at her April 2007 wedding and Peter her husband’s best man.

Alisa Houraney, who was pregnant at the time, married Steve at a fancy 250-person wedding at The Garden City Hotel in Garden City, LI.

But she said she soon suspected something was afoot between her cousin and husband.

Just before giving birth, Alisa Houraney, a beauty-shop owner from Selden, LI, said, she voiced her suspicions to her husband and to Liz Petrakis — both of whom denied the affair.

Then, on Aug. 26, 2007, the day Alisa gave birth to her first child, a son, Liz Petrakis and Steve Houraney met up, although both denied any sex occurred.

Steve Houraney, 43, a nightclub owner from North Carolina, said he simply met Liz at a fast-food restaurant.

Alisa Houraney later told Peter Petrakis, 41, of her suspicions about an illicit romance between their spouses, but he did not believe her, sources said.

Then Peter Petrakis found a suspicious e-mail from Steve Houraney to Liz and hired a private detective, who confirmed the hanky-panky with video, sources said.

Liz Petrakis confirmed the shenanigans to The Post — but said they had nothing to do with the end of her marriage.

“My marriage was deteriorating from 2002. Anything that happened in 2007, my marriage was way over,’’ she said.

“I did sleep with Steve Houraney, but that is absolutely not why my marriage was over.”

Steve Houraney said he discovered his friends’ marriage “was pretty much on the rocks,’’ but his affair with Liz Petrakis “was probably the last nail in the coffin.

“It was a big ‘Jerry Springer’ show,’’ he told The Post. “There is no justifying it.

“But it won’t affect [Liz’s] court case,’’ said Steve Houraney, who is now divorced from Alisa.

“I think that’s why [Liz] doesn’t care. The judge and the lawyers told her in the beginning they don’t care who she was sleeping with — it has nothing to do with anything.”

Last month, Liz Petrakis got a Brooklyn Appellate Court panel to toss the prenuptial agreement she signed with her husband four days before their lavish 1998 wedding.

The decision has been called unprecedented and sets a new precedent for high-stakes divorces.

Under their prenup, Peter Petrakis, who made his name parlaying a string of smoke shops into a $20 million commercial real-estate empire, stood to keep everything in his name if they split up.

But Liz Petrakis had argued that her husband had promised to “tear up” the prenup if they had children together and also pledged to put their Old Brookville home under both their names.

He reneged on both promises even after the couple had twin sons and a daughter, she said.

Liz Petrakis had called the prenup “a knife in my heart from Day One’’ and said it “broke apart this family.”

The court panel sided with Liz Petrakis, and the pair will now go through divorce proceedings.

Peter Petrakis refused to comment on Alisa Houraney’s claims.

But a source close to him, who attended the Houraney wedding, agreed that the affair was the reason for the Petrakis’ breakup.

“They were together until she slept with Steve,’’ the source said.

“Peter was like a brother to Steve,’’ the source said. “This is what destroyed the marriage, not the prenup. The reality is that Liz’s choices ruined her marriage. It destroyed two families.’’

Longtime divorce lawyer Raoul Felder, who is not involved in the case, said the infidelity would “not at all” affect the court case.

“Usually the back story is much more fascinating than whatever the judges rule on. [The court is] only concerned with the law, and this has nothing to do with the case,’’ he said.