"She's cashing out.

The wife of Yankee general manager Brian Cashman filed for divorce yesterday — a day after her husband was publicly accused of a second affair, this time with a woman who has been charged with shaking him down, The Post has learned.

Mary Cashman, 42, submitted divorce papers in Stamford, Conn., Superior Court, listing her husband as "B.M. Cashman" and writing that the marriage "has broken down irretrievably."

She is seeking permanent alimony, a split of their property and joint custody of their 13-year-old daughter and 8-year-old son.

Mary Cashman, who has now endured two publicly humiliating allegations of her husband's philandering, has been living apart from Brian Cashman in the family's $3.7 million Darien mansion with the kids, sources said.

She hired top divorce counsel Gaetano Ferro, who repped Jane Welch during her half-billion-dollar split from former GE boss Jack Welch.

Mary Cashman's divorce filing came less than 24 hours after a TriBeCa woman, Louise Meanwell, appeared in Manhattan Criminal Court on charges she stalked Brian Cashman and extorted more than $6,000 from him."