Porn star: Tiger is a 'big fat liar'

Tiger Woods "is a big fat liar" who slept with a porn actress 10 days after the birth of his child, according to a woman who claims a relationship with the golf megastar.

Joslyn James, real name Veronica Siwik-Daniels, held a press conference Monday with celebrity lawyer Gloria Allred at her side immediately after Woods's own press conference at his return to competition at the Masters in Augusta, Georgia.

"We believe he has not been rehabilitated," Allred told reporters and photographers at the event. "We are disappointed, we waited for the apologies to the mistresses, to the women. He didn't say to whom he lied."

James, 39, was more blunt.

"He is a big fat liar. He is not honest. After the birth of his daughter he was with me 10 days later," she said.

At his press conference Woods evaded the question when asked details of how he kept secret his cheating on wife Elin, who will not be joining him at Augusta.

"You're living a life where you are lying all the time," Woods explained. "I wasn't having any fun. Now I have stopped all that and it's fun again."

He added: "I hurt so many people close to me. I lied to myself. It's pretty brutal. I take full responsibility for what I have done."

Woods kept quiet when asked about many details of his numerous affairs, the November 27 car crash that launched the scandal, and his current relationship with his wife.

James earlier posted emails and text messages purportedly from Woods that suggested she and the golf star were texting each other during last year's PGA Buick Open near Flint, Michigan.