Rachel Uchitel, the top mistress in America's biggest sports cheating scandal of the past 50 years, is returning the majority of her settlement money.

Rachel reportedly scored a $10 million payday from golfer Tiger Woods to keep her mouth shut about their affair. That cash didn't last long.

TMZ reports Woods' lawyers are going after Uchitel for violating the strict confidentiality deal, forcing her to return a majority of the money to Tiger.

In turn, Uchitel, according to TMZ, is getting a legal team ready to sue famed attorney Gloria Allred, who helped her get the cash in the first place for, get this, malpractice while giving Allred a deadline to pay her the money she handed back to Tiger.

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