Jay Z's alleged mistress, Casey Cohen is threatening to sue the publications who named her as the catalyst that led to the break up of Beyonce and Jay Z's marriage. In a letter to Bauer Media Group -- which owns several national magazines -- Cohen claims she never slept with the aging rapper. Either she's lying or Jay Z paid her off to save his marriage.
The reality TV star accused of having an affair with JAY Z is flat out denying she ever had sex with BEYONCE'S man ... and now she's gearing up for a legal battle.
CASEY COHEN -- who was on the Bravo show "Princesses: Long Island" -- was named as Jay's alleged side piece in several magazines (such as In Touch) ... all owned by Bauer Media Group.
TMZ has learned Cohen has hired a lawyer who fired off a cease and desist letter saying Cohen and Jay Z "have never been in love or intimate" -- and dismissing all the Bauer articles as "a foul and phony mistress-rumor."
Cohen cops to having met Jay Z and Beyonce several times -- in the letter, obtained by TMZ -- but only through her job working as a VIP hostess in New York City.
She is demanding Bauer issue a public apology to her, Jay Z, and Beyonce ... and remove all posts about her from the Internet.
We've reached out to Bauer Media, but no word back.
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