She told a police operator, "I have a crazy woman who is involved with my husband and she's come to my house to harm me and my children."
With that 911 call, another on-the-job affair was exposed.
This time, the cheating husband was Steve Phillips, ESPN baseball analyst well-known in New York as the former general manager of the Mets.
Steve Phillips has admitted to having had a three-day fling in July with Brooke Hundley, a 22-year-old ESPN production assistant, who later showed up at Phillips' Connecticut home.
When Hundley showed up at the house, Marni Phillips said in her 911 call, "Please hurry and catch her -- she's crazy."
A police report says that, after Steve Phillips broke off his affair with Hundley, she repeatedly called and texted his wife, and even used aliases for online chats with their teenage son.
The New York Post published a letter from Hundley, which details the affair. Hundley even described birthmarks in Steve Phillips' genital area.
Hundley wrote in the letter, "I'm coming out now because I'm sick of hiding and sneaking around."
The Post also revealed that Hundley wrote a "script" for another woman, who repeatedly phoned Phillips' wife to tell her of the affair.
However, this isn't the first workplace sexcapade for Steve Phillips. He got in trouble with the Mets for an affair with an employee. Now he's on leave from ESPN, and his wife is divorcing him. So far, Hundley remains at the network.
ESPN issued a statement, saying, "We were aware of this and took appropriate disciplinary action at the time."
Phillips has acknowledged the affair and issued an apology to his family and colleagues.