Rumors are swirling that Tiger Woods has entered a sex rehabilitation program -- to save his marriage.
Kate Coyne from People magazine tells "Extra" that a source revealed that in late December, Tiger checked into The Meadows, an upscale rehab facility in Arizona, hoping to repair his marriage to Elin Nordegren.
"Tiger has been calling Elin nonstop, begging, pleading, to give him another chance," Coyne says.
Rehab may help him patch things up with his wife, but alleged mistress Jaimee Grubbs tells "Extra" she doesn't believe Tiger is an addict.
"I would go with my gut and probably say no, from what I do know of him," Grubbs says. "Whether or not he hung out with these other girls for it, maybe."
"Extra" Lifechanger and marriage therapist Alisa Ruby Bash says that something traumatic may have triggered the PGA star's behavior. "I think with Tiger, he's had so much pressure put on him, having to always keep up this good guy squeaky clean image."
Woods has been out of the public eye for 47 days.
See photos of Tiger and Elin during happier times:
Jamie Jungers -- one of the 11 women linked to Tiger Woods -- denied on the "Today" show Friday that she ever worked as a call girl.
"Never in my life. I've never been an escort and I never will be an escort. This is all news to me," she told Meredith Vieira.
Hollywood madam Michelle Braun told the New York Post Friday that Woods, 33, paid $60,000 for kinky nights with her employees, including Jungers, 26.
"He liked girl-on-girl," Braun alleges, saying that her girls called him "wild and a lot of fun... And that was tough to keep up with -- days at a time, just on a booze and sex bender."
Jungers responded on the "Today Show": "That's all funny -- I never even heard of the woman's name."
Jungers -- who will also appear on "Dateline" Friday -- says Woods bedded her the first night they met, inside a Las Vegas nightclub when she was just 21 years old.
She was surprised when Woods wanted a relationship instead of just a one-night stand.
"He said he loved spending time with me, would love to get to know me more, and he gave me his phone number and told me to save it in a different name in case I lost the phone," she says.
The golfer often met up with her in Las Vegas -- and even flew her to Los Angeles for trysts when his wife Elin Nordegren was out of town, she says.
"Every time we saw each other, it's like we became more and more comfortable with each other, it just became more of an actual relationship, a boyfriend-girlfriend relationship," she says.
Their year-and-a-half affair ended when a cash-strapped Jungers asked Woods to help her buy a house.
"He said, 'I can't,'" Jungers says. "I said, 'I don't understand.' I thought maybe he was joking. I was already embarrassed to ask about it. He said, 'I'm sorry, I can't.' And that's when I told him, 'That shows to me how much I mean to you, and I can't do this anymore. I'm already in a rough position in my life, and I have more drama and that's what I don't need.'"
Jungers says she has mixed feelings about whether she owes Nordegren an apology.
"Yes, and no; I mean, I wouldn't want somebody to do it to me, but I'm not going to take full blame for this," she says. "I never wanted this to come out, and I never would have said anything or I could have done it years ago."
Her attitude is different than Jaimee Grubbs, who told "Extra" she "felt guilty" sleeping with a married man.
"I couldn't describe how remorseful that I am to have hurt her family and her emotionally," Grubbs -- who was intimate with the golfer 20 times over about three years -- told "Extra."
Jaimee Grubbs tells "Extra" she thought she was Tiger Woods only "other woman."
"The second I did hear about Rachel [Uchitel]... that was the hardest part. It was kind of the breaking point of realizing that I may never be the only woman," Grubbs, 24, tells "Extra."
The day she received a voicemail from the married golfer asking her to delete her name from her cell phone's outgoing message was "a reality check," she admits.
"To know, this whole time, two-and-a-half years... I thought that I could have been the only woman," she goes on. "It hurts."
"I almost loved this man... I did love this man," she goes on. "I am changing my life and I'm changing his and this and that was the hardest part for me.
"It was kind of saying, you know, I'm not the most important person to him," Grubbs says. "I was hurt and I told my story and I didn't really think of what it was going to do."
When asked if she released the voicemail for revenge, Grubbs tells "Extra," "We're done. I mean, obviously, me telling the story wasn't the way I wanted to end things or say goodbye, but it's my closure."
"I am sorry for everything that is coming out," she goes on. "I thought it was time for his wife to know for me to let it go."
"Extra" has also learned that Grubbs has been approached to pose in Playboy, but nothing is a done deal.
For more on "Extra's" interview with Jamiee Grubbs, tune in tonight and tomorrow!
Tiger Woods let his fingers do the talking in his affair with Jaimee Grubbs.
The golfer sent his 24-year-old mistress a series of steamy texts, according to the new issue of Us Weekly.
"Hey sexy, I can't come out this week. Something came up family-wise," he wrote Grubbs earlier this summer, promising to meet up soon.
In September, he wrote, "I need u." Grubbs responded, "then get your tight a** over here and visit me. I need u!"
Woods' response? "I will wear you out soon." Grubbs then explains her new piercing -- a diamond implanted under her eye -- and Woods' asks if she has a boyfriend.
When she says, "I don't even have someone I am dating... no, u can be my boyfriend ;)," Woods -- who wed Elin Nordegren in 2004 -- responds, "then i am.... quietly and secretively, we will always be together."
His follow-up? "when was the last time you got laid?"
Woods also explained why he thought Grubbs had fallen for him: "Because I'm blasian," he wrote, referring to his Asian mother and African American father.
Their last text was on Thanksgiving -- less than 24 hours before he crashed his SUV outside his Florida mansion after apparently fighting with his wife about another alleged mistress, Rachel Uchitel.
On Wednesday, Grubbs apologized to Nordegren for carrying on a nearly three-year affair.
"I couldn't describe how remorseful that I am to have hurt her family and her emotionally," Grubbs told "Extra."
She continued, "If it wasn't me, it was going to be other girls. I did care about him -- I didn't do it for superficial reasons. I didn't do it to purposely hurt her."
For more of "Extra's" interview with Grubbs, tune in tonight!
Jaimee Grubbs admits she sometimes had second thoughts about sleeping with Tiger Woods, a married father of two.
"I guess if I were to think about it, I did feel guilty that he was spending his time with somebody that isn't his wife," she tells "Extra." "But you know, he never mentioned her. I never thought about it."
By the time she learned he was wed to Elin Nordegren, "we already had this relationship," she says. "And he was the one who pursued me, and I just kind of got involved in this... I had invested emotions in it. I let myself think, 'out of mind, out of sight' type feelings."
Woods has been linked to 11 women, including Grubbs -- but she doesn't think he's a sex addict.
"The Tiger that I knew, I would never think that," says Grubbs, who has claimed she was intimate with Woods about 20 times over a three-year period.
She admits that Woods has a "sleeping problem." According to reports, Nordegren told police that her husband had taken painkiller Vicodin and sleep aid Ambien before his Nov. 27 car crash.
"He did never sleep. I mean, even if he wanted to go to bed at maybe 10, he wouldn't fall asleep until 12:30, 1 [AM], and then he'd be up at 3," she continues.
She credits his restlessness to the pressures of his athletic status.
"I'm sure he has so much on his mind, and I couldn't ever imagine it being put to sleep," she says. "He very much does have a sleeping problem."
For more on "Extra's" interview with Jamie Grubbs, tune in tonight!
Jaimee Grubbs sat down with "Extra's" Lauren Sanchez to discuss her affair with Tiger Woods -- and apologize to his wife, Elin Nordegren.
"I couldn't describe how remorseful that I am to have hurt her family and her emotionally," Grubbs -- who got intimate with the golfer 20 times over about three years -- tells "Extra."
But, Grubbs, 24, admits, "If it wasn't me, it was going to be other girls. I did care about him -- I didn't do it for superficial reasons. I didn't do it to purposely hurt her."
She stops short of saying they were in love.
"Love is obviously a very strong word for me to even use," she admits. "I wouldn't necessarily say that I didn't love him. But I couldn't... I did never say that I did love him. I didn't let myself get that far."
Grubbs thinks Woods and Nordegren should "try to work" out their relationship.
"He's an amazing guy despite everything that is coming forth," Grubbs says of the father of two, who has been linked to 11 women. Grubbs and Woods allegedly had plans to hook up even as he and Nordegren were due to give birth to their second child, Charlie.
Grubbs isn't sure she'd be intimate with Woods again if he called it quits with Nordegren.
"I can't say that I would ever go back to him. I would definitely have a relationship with him whether it was friends or just to have him in my life," she says. "But as far as going back to him emotionally like I was -- I don't know if I can put myself through that again."
Grubbs says Woods "never mentioned his wife" when they were together.
"I wouldn't have pursued him if he didn't pursue me. I mean, when he did, I just figured he was single and I didn't think to ask," she says. By the time she learned he was married, they were "already in a relationship," she explains.
"I knew we had a respect between the both of us, that we cared deeply for each other and we did very much trust each other," Grubbs says of Woods. "But the words were never there. Nothing about the relationship was fake that I felt."
Grubbs describes her first kiss with Woods, whom she met in Las Vegas when she was just 20 years old. It wasn't until the morning after they met.
"We were sitting to eat and we were play fighting and we had our first kiss," she says. "It was very gentle, very sweet. It wasn't quick, but it wasn't a makeout session or anything like that. It was very respectable."
She says she kept their "intimate relationship... very sacred. It was something between the two of us that I did grow to love very much."
Even when they weren't in the same town, "we very much had a relationship," Grubbs says. "We did talk very often, we did talk about my jobs or whatever it may be. He was always interested in how my life was going and every holiday he would say, 'I hope you have fun with your family and I hope things are going well.'
Grubbs says she was last with Woods on Oct. 18 -- about a month before his controversial Nov. 27 car crash.
She says Woods made her "feel like I was the only girl, so to go back and see specifically now when there's more and it's really hard."
She explains that she felt the need to come forward with her story after hearing she wasn't Woods' only woman.
"Seeing that was devastating. It hurts," she says, saying they were "done" as soon as she found out. Hearing about Rachel Uchitel -- whom she calls herself "very similar to, very social, very outgoing" -- "hurt" the most, she says.
What would she say to Woods if she had the opportunity?
"I would tell him that no part of our relationship was fake and I cared for him. It would hurt the way he made me feel [because] he was doing that with other women and I am sorry that everything is coming out and happening the way it did, but I needed to get everything off my chest."
She says she has no regrets.
"I've learned from everything that I did. Had I not acted on emotion, I probably would have taken a second to think of how it was going to affect my family and the impact it was going to have not on my life, but on everybody that's been involved in this," she says.
For more of "Extra's" interview with Grubbs, tune into tonight and tomorrow!
Check out pictures of Tiger and his family below: