While she has withheld some details, Nordegren, 30, said she is speaking out now because she wants to set the record straight and also sees opening up as a step toward healing. But she told People she had no intention of addressing the matters again, saying she hoped she and her children could get the privacy they needed to adjust to their new lives.
Despite everything Nordegren said she has no regrets and is gracious toward her ex.
"I wish him all the best in the future, as a person and as an athlete," she said. "I know he is going to go down as the best golfer that ever lived, and rightfully so. I feel privileged to have witnessed a part of his golfing career."
Nordegren's interview with People was conducted in four parts totaling 19 hours, with the Swedish-born Nordegren writing down some of her answers to make sure her English was accurately describing her feelings.
"She's still in a bad place, but getting better," People Magazine Deputy Managing Editor Peter Castro told "Good Morning America" Wednesday. "This is a woman with incredible grace and poise and really a model for how you should repair your life."
In the days that followed, there were reports of an alleged relationship between Woods, 34, and a New York City nightclub hostess. Before long, several other allegations were made about even more women.
And there was the now infamous voicemail, purportedly left by Woods for cocktail waitress Jaimee Grubbs.
In the message, a panicked voice identified as Woods by US Weekly apparently begs Grubbs to change her voicemail greeting. The voicemail is from Nov. 24, the day before reports of his alleged affairs surfaced, according to US Weekly.
"Hey it's Tiger. I need you to do me a huge favor," the caller says in the message. "Can you please, uh, take your name off your phone? My wife went through my phone and may be calling you. If you can, please take your name off that and, um, what do you call it, just have it as a number on the voice mail. Just have it as your telephone number. You have to do this for me. Huge. Quickly. Bye."
In the end, Woods was rumored to have been involved with more than a dozen women, including a porn star.
He eventually admitted he cheated. In an effort to save his marriage, he took time off from golf and sought treatment in a private clinic.
As all this unfolded, Nordegren said she experienced "absolute shock and disbelief."
"I felt stupid as more things were revealed -- how could I not have known anything? The word 'betrayal' isn't strong enough. I felt embarrassed for having been so deceived. I felt betrayed by many people around me," she said.
Even so, she wanted the marriage to work.
"Initially, I thought we had a chance, and we tried really hard," she said.
And although she wanted her children to have a family, she decided that it was better to split up.
"I am now going to do my very best to show them that alone and happy is better than being in a relationship where there is no trust," she said.