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Bobby Flay’s divorce from Stephanie March is getting even spicier: Lawyers for the celebrity chef on Monday filed court papers to uphold their hotly contested prenuptial agreement.

Flay filed for divorce last week after 10 years of marriage, and under the terms of the prenup signed before their wedding, Flay is required to pay March $5,000 a month.

He sent a check to March over the weekend, but her lawyer Deborah Lans reportedly sent a letter — and the check — back to Flay’s camp.

Lans challenged the prenup, calling it “unenforceable.”

Monday afternoon, Flay’s power attorney Nancy Chemtob asked the court to affirm the validity of the prenup.

March also complained over the weekend that Flay canceled her credit card for household expenses.

But sources tell us the card was canceled because the prenup only requires Flay to pay March $5,000 a month.

We’re told March has six months to move out of the couple’s New York apartment, where the “Law & Order: SVU” actress is currently staying with her ill mother.

Flay has taken a temporary apartment elsewhere in the city.

We’re also told the prenup has no infidelity clause, meaning it’s not affected either way if one or both parties had an affair, and Flay’s team believes it is fully enforceable.

A lonely Flay, meanwhile, was seen in the Hamptons dining on a lobster roll and drinking a beer solo at Bostwick’s Chowder House on Saturday, where a fellow diner said, “He wasn’t talkative, he kept to himself.”