Stephanie March has officially turned up the heat in her on-going split from husband Bobby Flay!

According to a new report from In Touch Weekly, the Law & Order: Special Victims Unit star, 40, has filed formal court papers accusing the famed chef, 50, of having an affair with actress January Jones.

“Stephanie is claiming in court papers that Bobby committed adultery with January several times in the early months of 2010,” an insider told the magazine.

bobby flay and stephanie march

Bobby and Stephanie in February 2013.

“She says they had sex many times and in different places, including the London hotel in Los Angeles,” the source continued.

It’s long been speculated that the 37-year-old Mad Men star and the chef have had an affair. In June 2010, January crashed her car and called Bobby for help — and they were caught by the paparazzi.

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The duo tried to justify their actions by saying they met in a group setting and exchanged numbers so Bobby could help the blonde beauty with a kitchen remodel project at her home — but Stephanie isn’t buying it.

january jones

January in October 2013.

“[Bobby and Stephanie] had a huge fight over January shortly before Stephanie asked him to move out of their place,” a source told In Touch. “There is communication between Bobby and January that indicates they were more than acquaintances.”

The Food Network star — who is dad to an 18-year-old daughter, Sophie, with his second ex-wife, Kate Connelly — and his third wife, Stephanie, were married for 10 years before announcing their divorce in early April.