Billionaire John Paulson’s pregnant fiancée, registered dietician Alina de Almeida, is now entitled to a share of his $5.1 billion fortune — and his wife isn’t happy about it.

Jenny Paulson’s attorney argues in a new court filing that the pregnancy was part of a plan to allow de Almedia, 36, access to “marital assets” and that it will “pit” a new baby against the Paulsons’ two daughters.

It also reveals that the daughters, both college students, only found out that de Almeida is expecting when Paulson, 68, texted them a link to Page Six’s exclusive announcement last month.

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Page Six recently announced that hedge-fund billionaire John Paulson and his fiancée, Alina de Almeida, are expecting a baby — which his wife claims was news to her.GC Images

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Paulson’s estranged wife found out her husband had left her for de Almeida (above) by reading about it in Page Six in 2021.David Benthal/BFA.com/Shutterstock

It’s a familiar story: The Paulsons have been embroiled in a bitter divorce ever since Jenny, now 53, discovered from Page Six that her husband was ending their 21-year marriage to be with de Almeida, back in 2021. He subsequently proposed to her despite still being married.

Paulson, a hedge funder with a mammoth net worth, has been battling to dismiss Jenny’s legal bid to uncover the trusts where he has stashed his money — dubbing it a “selfish money grab” and calling her “greedy.”

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Jenny and John Paulson wed in 2000 and are now embroiled in a bitter divorce.Patrick McMullan via Getty Images
A source close to Paulson insisted that his daughters were told of the pregnancy before he texted them about the Page Six story.

Jenny’s legal team, helmed by high-powered divorce lawyer Robert Cohen, this week filed an amendment to her current complaint.

Earlier this month, de Almeida told Page Six that she and Paulson are “very excited” by the news of their upcoming arrival.

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De Almeida and Paulson at the Save Venice ball at the Plaza Hotel in NYC in April 2023David Benthal/BFA.com/Shutterstock

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De Almeida, Paulson and socialite Julie Macklowe soaked up the fun at The Macklowe Family’s Barbie Dream House bash in the Hamptons in August 2022.Rob Rich/Shutterstock
“This is something we had been planning. It wasn’t much of a surprise. We have been together now for three years, and I have always wanted a family, and I know John will make a great father,” she added.

It’s that very family planning that, Jenny’s amended complaint argues, is the problem: “Mr. Paulson has now unilaterally acted to plan and expand that class of beneficiaries to include a child born outside the marriage to another woman and — because of the terms of the trust — created a situation where that child’s mother may also seek distributions from the trust.”

A source close to the case told Page Six: “Did Mr. Paulson or his girlfriend consider, as part of what she said was the ‘plan’ to get pregnant, that having a child out of wedlock during the divorce proceeding might financially benefit the girlfriend?”

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“John has moved on with his personal life and would hope that Jenny would do the same, rather than push for years of needless litigation,” Paulson’s lawyer said of Jenny (above).Patrick McMullan via Getty Images
The filing claims Paulson has violated the Domestic Relations Law — family law that concerns the relationships within a household — by starting a new family while still married to Jenny.

“Taking marital property and giving it to someone entirely outside the marriage, including your new girlfriend – that is the very definition of a violation of the Domestic Relations Law,” the document reads.

It also alleges that by “adding another beneficiary and … permitting Mr. Paulson’s new girlfriend, with whom he has no legal relationship, to seek distributions from the Trust on behalf of the new beneficiary, Mr. Paulson has added yet further discord, pitting the children of his marriage against his future children and girlfriend.”

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Jenny Paulson’s latest divorce-related court filing claims that, with de Almeida’s (above) pregnancy, her estranged husband is “pitting the children of his marriage [to Jenny] against his future children and girlfriend.”Patrick McMullan via Getty Images
Paulson’s attorney, Marilyn Chinitz, told Page Six in a statement:

“Despite the fact that she will remain one of the richest women in the world following this divorce, Jenny continues to push to take money away from her children to enrich herself because she finds it humiliating that her daughters would be worth more than her as a result of the irrevocable trusts set up for the children … John has moved on with his personal life and would hope that Jenny would do the same, rather than push for years of needless litigation.

“The trusts ensure that John and Jenny’s daughters and their future children will be set for generations to come; that likewise will not change.”