TMZ.com reports that Jaimee Grubbs, who has appeared on the VH1 reality show "Tool Academy," claims that she met Woods in Las Vegas in April 2007, when she was working as a 21-year-old cocktail waitress, and began what she says was a 31-month-long affair.
According to Us Weekly, Grubbs has more than 300 text messages from Woods, who married Elin Nordegren in 2004.
The magazine, which comes out tomorrow and claims that Grubbs had 20 sexual encounters with the star athlete, also has photos, racy messages and a Nov. 24 voicemail allegedly from Woods, in which he suggests his wife may know about the alleged affair.
Allegations have also been made that Rachel Uchitel, a New York nightclub hostess, carried on a relationship with the married athlete. She claims the rumors are untrue.
The rumors came to light after a Nov. 28 car crash in which Woods was injured when his car struck a fire hydrant and a tree near his Florida home. Reports swirled that he and Nordegren had a fight before the accident took place, during which she allegedly confronted him about rumors of his affairs.
Woods said in a statement on Nov. 29 that the "embarrassing" accident was entirely his fault and that he's "not perfect," while his wife "acted "courageously" when she saw that he was hurt, adding that any other assertion is "absolutely false."